25 comments

  • pazimzadeh5 hours ago
    Funny timing, I just went to a tanning salon for the first time yesterday. I asked for the weakest bed (level 1), which has the most UVB (for vitamin D production). They were shocked that I wanted to use level 1, apparently no one uses it. They also suggested starting at 5 mins instead of the 1-2 minutes I wanted to do. The machine itself has a notice saying not to go over 3 mins for the first week.<p>I was following the protocol from this paper, which started people at 2 mins and used low wattage UVB-heavy bulbs.<p>Sunbeds with UVB radiation can produce physiological levels of serum 25-Hydroxyvitamin D in healthy volunteers<p><a href="https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC5821157&#x2F;" rel="nofollow">https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC5821157&#x2F;</a><p>Unfortunately the Science Advances paper being discussed is epidemiological and doesn&#x27;t distinguish between the type of bulb, length of time, and other parameters used while tanning. However it is safe to say that the average tanner cares more about getting dark than anything else.<p>I think there would actually be a market for vitamin D centered &quot;healthy tanning&quot; where only low wattage, high-UVB bulbs are used particularly in cloudy areas or where the winter is long. I&#x27;m that guessing the operating costs for that kind of business would be cheaper than your average tanning salon, too.
    • Melatonic52 minutes ago
      I looked into this extensively during lockdowns. There is a specific wavelength that maximises Vitamin D. And there are medically approved devices that use special fluorescent bulbs that output this. It&#x27;s mainly used in Nordic countries.<p>I tried to find an LED strip equivalent but couldn&#x27;t not - there are strips that produce a lower wavelength than UV-A but from what I remember it was too low of a nm for good vitamin D.<p>Could be an interesting product however ! I wanted to hand two strips in my shower and turn them on for a few minutes while I washed up during the winter.<p>Unfortunately even the tanning beds you were using still produce a lot of UV-A which will age your skin. And funnily enough UV-B also produces a much longer lasting tan (though slower) which would mean less return trips for people who are just looking for aesthetics
    • Liftyee5 hours ago
      Interesting... What benefits does this have over vitamin D supplements?<p>I&#x27;ve seen this &quot;optimising for some perceived negative effects&quot; thing with toothbrushes&#x2F;toothpaste, where &quot;whitening&quot; and stiff bristles actually just means removing more (irreplaceable) enamel from your teeth.
      • pazimzadeh2 hours ago
        Many people with inflammatory disease like IBD can&#x27;t absorb oral vitamin D properly<p>Even in healthy people, oral vitamin D is not always sufficient (there was a study done in Japan where sunlight is low but Vitamin D from fish is high - can&#x27;t find it right now) and sunlight exposure might have other benefits than vitamin D anyway<p><a href="https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0022202X2400280X" rel="nofollow">https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0022202X2...</a>
      • nostrebored3 hours ago
        Vitamin D supplements don’t work consistently across different populations. Very few (~10%) of people can absorb dietary vitamin D. If you aren’t some form of Northern European, you probably need to take at least 10 times the daily recommended dose of vitamin D to influence your levels significantly.<p>Most people need sun!
        • notKilgoreTrout3 hours ago
          Don&#x27;t most people who take supplements just take 10X the RDA? It is still a tiny amount of supplement that is safer and costs a fraction of the indoor tanning or traveling often to somewhere with adequate Sun.
          • nostrebored2 hours ago
            I’ve never talked to someone supplementing vitamin D who was aware at all.<p>I think that the correct approach would be start at 10x vitamin D with baseline bloodwork and adjust dosage from there.<p>But yeah I’m in the camp of “sun is good for you, in most cases.” I would be very unsurprised to find that there are precursor hormones released beyond vitamin D that impact efficacy. We don’t really understand the endocrine system very well.<p>I think that because we can see and understand the dermatological effects we overly weight them. Anecdotally older people I know who have not avoided the sun seem much better off mentally and physically, but I think because there isn’t a measurable reason we’re aware of, we completely discount any benefit.
      • MaKey4 hours ago
        Stiff bristles also damage your gum more easily and can lead to gum recessions. I needed gum transplants because of this and a wrong brushing technique. For me even medium stiffness is too hard.
    • hn_throwaway_9937 minutes ago
      I use the Sperti Vitamin D sunlamp at home during the winter months. It wasn&#x27;t cheap but wasn&#x27;t crazy expensive either and seems to be what you want (e.g. UVB).
      • nutjob20 minutes ago
        It&#x27;s $640.<p><a href="https:&#x2F;&#x2F;www.sperti.com&#x2F;product&#x2F;sperti-vitamin-d-light-box&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.sperti.com&#x2F;product&#x2F;sperti-vitamin-d-light-box&#x2F;</a>
    • beAbU1 hour ago
      What&#x27;s old is new again:<p><a href="https:&#x2F;&#x2F;img.ifunny.co&#x2F;images&#x2F;5ab4dda29b9dd88acc439076537e0c4246d86b52b3ce03093de06422d55f4dd0_1.jpg" rel="nofollow">https:&#x2F;&#x2F;img.ifunny.co&#x2F;images&#x2F;5ab4dda29b9dd88acc439076537e0c4...</a>
    • sutterd1 hour ago
      I do exactly what you are describing and it seems to work for me, from a vitamin D perspective. I started this because I read a paper stating the same health benefits were not seen from supplements as with people who got the vitamin D from sunlight. I believe that is true, but of course can not be certain.
  • voidmain6 hours ago
    There&#x27;s a history of finding really strong correlations between vitamin D levels and (many kinds of) health, and then disappointing results for RCTs of vitamin D supplementation. There are lots of possible explanations of this, but it seems like a plausible one is that there are some good things sunlight does for you other than produce vitamin D. So I&#x27;m a little nervous about everyone eliminating all sun exposure and then taking vitamin D geltabs to compensate, even though sunlight carries some risks. (But obviously too much ionizing radiation is also a problem, and it sounds like most users of tanning beds are getting a lot of intense exposure)
    • Workaccount26 hours ago
      I wonder how much correlation this has with exercise. Generally if you are getting good levels of sunlight, there is a good chance you are outside exercising, even if it&#x27;s just walking.<p>After all, exercise is the undisputed God tier all-time winning champion of &quot;Studies show that ______ is good for xyz.&quot;
      • james_marks2 hours ago
        I remember a study where they shone light on the back of the knee to control for this.<p>While I believe there are many benefits of being outside and exercising, there does appear to be specific benefits to sun-like UV exposure.
      • jerlam3 hours ago
        Also gives you a brief respite from sitting in a climate-controlled environment and staring at screens.
    • scoofy1 hour ago
      There are plenty of foods with vitamin D. You don&#x27;t actually need to supplement it unless you&#x27;re a vegetarian, you just need to actively include those foods in your diet.<p>The current argument I&#x27;ve read for why fair-skinned people even evolved near the North Sea and not anywhere else near the arctic is exactly that the Gulf Stream allowed a cereals-based diet rather than a meat based diet, which led to vitamin D deficiencies which caused problems in pregnancy, leading to people with fairer skin being the most likely to avoid those problems.<p>You definitely don&#x27;t need to get your vitamin D from the sun.
      • hirvi7446 minutes ago
        &gt; There are plenty of foods with vitamin D.<p>My favorite one that I read about is mushrooms. If you grow them in the sun, some species allegedly acquire vitamin D. I am not sure how much nor if this is truly effective, but it gives me a good excuse to grow various mushrooms next spring.
    • d3Xt3r3 hours ago
      Exposure to sunlight (or lack of it) affects our circadian rhythm and production of melatonin, which affects our sleep quality. Exposure to morning sun in particular is linked with better sleep quality, leading to better health.<p><a href="https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC12502225&#x2F;" rel="nofollow">https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC12502225&#x2F;</a>
    • jnwatson5 hours ago
      UVA triggers the release of nitric oxide from the skin into the bloodstream. This causes blood vessels to dilate, lowering blood pressure and improving circulation.
    • koliber2 hours ago
      Some of the positive sunlight exposure benefits are trivial to see.<p>- running around outside, because physical activity if healthy<p>- spending an afternoon in the company of good friends or family<p>- gardening, which can produce veggies that are pesticide free<p>Not everything is a biochemical direct benefit of the sun’s rays. Some of the positive effects are a few steps removed.
    • cmclaughlin5 hours ago
      Here’s a podcast on this:<p><a href="https:&#x2F;&#x2F;www.artofmanliness.com&#x2F;health-fitness&#x2F;health&#x2F;podcast-1004-the-sunscreen-debate-are-we-blocking-our-way-to-better-health&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.artofmanliness.com&#x2F;health-fitness&#x2F;health&#x2F;podcast...</a>
    • manoDev5 hours ago
      There are multiple studies showing infrared enhances mythocondria function, and this is already used therapeutically.
    • scotty793 hours ago
      &gt; There&#x27;s a history of finding really strong correlations between vitamin D levels and (many kinds of) health, and then disappointing results for RCTs of vitamin D supplementation.<p>This might just mean that bodies that are healthier in many other aspects are also better at managing their vitamin D stores which isn&#x27;t all that surprising.
    • Aiisnotabubble5 hours ago
      [dead]
  • miladyincontrol10 hours ago
    Excessive UV exposure in general not a great time, tanning is just a way of speedrunning damage unless done in very short intervals.<p>I&#x27;ll never understand some people&#x27;s fetishization with getting darker via tanning though. Theres nothing wrong with light skin, its only a few western countries that seem to have a weird fetishization with cooking your skin longterm to get darker short term. Meanwhile most other countries and peoples are willing to damage their skin in whole other ways trying to get the opposite.
    • tveita9 hours ago
      They&#x27;re both imitations of status symbols<p>&quot;wealthy people can stay inside while poor people work in the sun&quot; vs. &quot;wealthy people can vacation in sunny countries while poor people stay home in the cold&quot;
      • mrits7 hours ago
        The US has 200 million white people that live in a mostly warm and sunny climate. Women often tan before vacations or events so they look better in the pictures.
        • viking1236 hours ago
          I live in Asia and I think tanned white people do not look good at all most of the time, to me it just looks weird. I much prefer the pale look. People with naturally tan skin however I think look very good.
          • echelon6 hours ago
            It&#x27;s 100% cultural. I think the pale look is super unattractive and ghostly&#x2F;ghoulish. Tanned skin is beautiful.<p>It&#x27;s not that it is a sign of wealth due to leisure. People who work outdoors are tanned too. It&#x27;s the warmness. The glowing. The gradients. Something impressed upon me at a young age that this is the standard of beauty.<p>When I&#x27;m in Asia and I see people carrying umbrellas and doing skincare, their skin looks clinical and less appealing to me than those who aren&#x27;t doing it. I logically know the anti-sun regime is healthier for their skin, but my primate brain tells me it&#x27;s unattractive.<p>It&#x27;s unfortunate that increasing melanin production from the sun causes DNA damage. Because it looks so good to me.<p>There are a variety of drugs that induce pigmentation or melanocyte production, but none are FDA approved. Most of them can lead to cancer, either by uncontrolled cell proliferation, impact on unrelated cell populations, or disrupting normal hormonal signalling.<p>Melanotan-II was popular some years back, but there are half a dozen others that use a variety of different mechanisms. None of them are approved.<p>It&#x27;s unfortunate that we haven&#x27;t developed something better than exposing ourselves to DNA damage, but it&#x27;s probably not the biggest priority.
            • temp08265 hours ago
              I don&#x27;t know if it&#x27;s every Asian country, but Thailand absolutely has an obsession with skin whitening products (whiter skin is correlated with wealth&#x2F;higher-class and not having to work outside). I found it hard to find a non-whitening lotion while there actually. I really doubt many of these products are safe and it looks very uncanny-valley and weird to me, which is maybe what you&#x27;re picking up on as unattractive too. Definitely a cultural thing.
              • viking1235 hours ago
                The women look much much younger than western equivalents though because they avoid the sun. It&#x27;s hard to look at western girls in twenties who look like they are in their mid 30s. However, the western girls who have used sunscreen tend to look super good with the original skin.
                • temp08262 hours ago
                  Oh don&#x27;t get me wrong, I&#x27;m not a fan of the overcooked look either. The damage really adds up quick, I doubt many look ahead to their 40s-50s while torching their 20s away though (something something youth wasted on the young)
            • viking1235 hours ago
              I grew up in Northern Europe and I still think when people back home do tanning it looks so bad and makes them look super old. They look much better with the natural skin as it&#x27;s not damaged and it&#x27;s kind of even. Like I see women in their 20s easily looking like 35 no kidding. I am glad I avoided the sun from young age so I get comments now in my 30s that I look like early 20s which is mostly due to the skin.<p>Like sometimes I watch American news and the fake tans are just yucky and kind of gross to me.<p>Same with western women I see in Asia occasionally, age in 20s but looks easily 30+ while it&#x27;s the opposite with many Asians. Eastern Europeans tend to avoid the sun more.
        • Forgeties796 hours ago
          Men (7.4%) and women (11.5%) both do it, but yes women in the US in larger numbers. Worth mentioning it’s still a substantial % of men.<p><a href="https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC5664932&#x2F;#:~:text=9.5%25%20of%20adults%20were%20intentionally,(11.4%25%20vs%207.5%25)." rel="nofollow">https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC5664932&#x2F;#:~:text=9....</a>
          • mrits6 hours ago
            What do you think those numbers represent? Just so everyone is clear, it&#x27;s still 12% when we are talking about females who <i>frequently</i> outdoor tan of all races with half the group over 45 years old in a tiny test group. Not exactly relevant
    • kens4 hours ago
      The popularity of tanning is attributed to fashion designer Coco Chanel, who accidentally got too much sun on a Mediterranean cruise in 1923. Since she was a fashion icon, this made the tanned look fashionable.<p>As an aside, the chemistry behind UV damage is interesting. You can think of DNA as a sequence of four letters: C, G, A, and T. If there are two neighboring T&#x27;s, UV can move a bond, linking the two T&#x27;s together (i.e. thymine dimerization). If you&#x27;re in the sun, each skin cell gets 50-100 of these pairs created per second. Enzymes usually fix these errors, but sometimes the errors will cause problems during DNA replication and you can end up with mutations. Enough of the wrong mutations can cause skin cancer. So wear sunscreen!<p><a href="https:&#x2F;&#x2F;pdb101.rcsb.org&#x2F;motm&#x2F;91" rel="nofollow">https:&#x2F;&#x2F;pdb101.rcsb.org&#x2F;motm&#x2F;91</a>
      • kens2 hours ago
        It&#x27;s too late to edit my previous comment, but I wanted to add one more random tanning fact: UV releases β-endorphin so tanning is literally addictive, to the point that naloxone will cause withdrawal symptoms, at least in mice: <a href="https:&#x2F;&#x2F;www.cell.com&#x2F;cell&#x2F;fulltext&#x2F;S0092-8674(14)00611-4" rel="nofollow">https:&#x2F;&#x2F;www.cell.com&#x2F;cell&#x2F;fulltext&#x2F;S0092-8674(14)00611-4</a>
    • brap8 hours ago
      I’m naturally pretty pale and don’t get much sunlight, I feel like I look like shit unless I get just a little bit of tan. What most people would consider just a healthy looking “baseline”. It also puts me in a better mood although that may be entirely psychological.<p>When I was younger I used to intentionally tan for short durations, but now I realize that’s harmful so I just embrace the cave gollum look
      • viking1236 hours ago
        I am white as paper, probably one of the palest people and I live in Asia and often get comment that I have the dream skin. While back at home my parents were teasing me about being a ghost and doctors asking am I sick. Interesting how it changes on cultural basis
        • brap3 hours ago
          I think it’s more than just cultural. Yes, it’s definitely a factor, and there are cultures and there were times where paper white was considered beautiful.<p>But I think on some level we naturally associate severe paleness with being sick or non-social.<p>I say this as the original commenter
          • viking1233 hours ago
            Not sure really I am not an expert on this, where I live now and look at some of the wealthy people, they are extremely white like on purpose. Some of the leading politicians too. In fact, it&#x27;s a bit difficult to find a very dark skinned celebrity or a powerful politician here, there are some but not many at all.<p>To me personally, I like naturally tan skin (like Asian natural skin) &gt; natural white skin &gt; artificial tanned skin &gt; heavy tanning. Tanned white people just do not look good to me.<p>If you asked someone else where I live now, I bet answer would be different<p>To me, something like RFK Junior skin looks disgusting. I always wince when I see a picture of him, like you could make that into leather bag.
      • scotty793 hours ago
        Just eat&#x2F;drink a lot of carrots instead.
      • prmoustache6 hours ago
        Why don&#x27;t you just spend time outside a little bit?
        • retrac4 hours ago
          Exposing large amounts of skin to the sun has other health risks when it is freezing outside. :)<p>Vitamin D deficiency is very common in Canada particularly during winter. The government recommends that everyone intentionally seek out vitamin D rich foods, or to take a supplement.
      • api7 hours ago
        The mood is probably part light and part vitamin D. The latter can be supplemented. The former can be reproduced with a full spectrum bright lamp or brief sun exposure in the morning.
        • yunwal7 hours ago
          I mean sort of but you should probably just get some sun if you can. There’s such a thing as too much tanning, sure, but getting no sun is not healthy either.
          • nemomarx6 hours ago
            Be sure you&#x27;re taking care of your skin doing it, though. Get the good European sunscreens and so on, you don&#x27;t want to age yourself prematurely.
        • hexbin0106 hours ago
          I&#x27;ve tried all kinds of Vitamin D&#x2F;bright bulbs&#x2F;staring at the sun over the years and they do nothing for my mood
    • thisislife29 hours ago
      Cosmetic companies to blame? In the east, they fetishize white &#x2F; fair skin, while in the west they fetishize dark skin.
      • miladyincontrol7 hours ago
        Possibly. Its actually insanely frustrating as someone pale that most western brands rarely approach the level of lightness I need to match my skin, and the few that come close often are almost always rather saturated, highly warm tones.<p>They almost always just stick to tones within the realm of pantone&#x27;s skin guide, treating it more like a skin bible instead.<p>Haus labs and their triclone in 000 is one of the few foundations I&#x27;ve ever had match.
        • prmoustache6 hours ago
          People with dark skin do also still struggle to find their tones in most western countries unless they live in a huge city.
      • asdfasvea7 hours ago
        No, people who do it are to blame.
    • Tha_149 hours ago
      You can always use Melanotan II instead to get a good tan while also increasing libido and sleep quality; )
      • fhdkweig7 hours ago
        <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Melanotan_II" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Melanotan_II</a> says it is banned in the United States, and anything you get on the black market isn&#x27;t guaranteed to be pure.
        • 0_____07 hours ago
          Where does it say it&#x27;s banned?
          • fhdkweig6 hours ago
            Second paragraph mentions &quot;regulatory restrictions&quot;.<p>Clinuvel Pharmaceuticals intended to offer it as a cosmetic, but abandoned this pursuit in the 2000s due to regulatory restrictions and concerns about the promotion of suntanning. Unlicensed Melanotan II is found on the internet, although health agencies advise against its use due to lack of testing and regulatory approval.
          • IAmGraydon6 hours ago
            It’s banned for cosmetic use. You can still buy it as a “research chemical”.
            • echelon5 hours ago
              Do not buy it.<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46345971">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46345971</a>
      • IAmGraydon6 hours ago
        I’m pretty sure Melanotan carries the risk of retinal pigmentation, or at least that was the case with the original. Not sure if II is different.
      • echelon5 hours ago
        BEWARE.<p>Melanotan is dangerous, sadly.<p>Tanning causes melanocyte production in your epidermis. Melanotan causes it throughout your body in an uncontrolled manner. In a wide variety of unrelated tissues.<p>It can lead to uncontrolled melanocyte production that doesn&#x27;t shut off - cancer. Aggressive melanomas.<p>It disrupts normal hormone signalling which may downstream cause a variety of deleterious health effects and disease states.<p>There are also crazy reports of kidney failure, which may or may not be caused by the drug.<p><a href="https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC7148395&#x2F;" rel="nofollow">https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC7148395&#x2F;</a><p><a href="https:&#x2F;&#x2F;pubmed.ncbi.nlm.nih.gov&#x2F;23121206&#x2F;" rel="nofollow">https:&#x2F;&#x2F;pubmed.ncbi.nlm.nih.gov&#x2F;23121206&#x2F;</a><p><a href="https:&#x2F;&#x2F;www.actasdermo.org&#x2F;en-eruptive-dysplastic-nevi-following-melanotan-articulo-S1578219012001357" rel="nofollow">https:&#x2F;&#x2F;www.actasdermo.org&#x2F;en-eruptive-dysplastic-nevi-follo...</a>
    • the__alchemist5 hours ago
      It&#x27;s indeed, baffling, ignoring health consequences: Get fashionably darker skin now: Make your skin look (reasonably universally) irreversibly uglier&#x2F;older gradually over time. This is perhaps the most controllable way to affect how old you look.<p>It becomes unmissable once someone is in their 30s: Some still have youthful skin, while others are wrinkly, splotched, and saggy.
      • viking1235 hours ago
        I often see women in their mid 20s looking like 35 simply because of the skin.
    • lelanthran8 hours ago
      &gt; I&#x27;ll never understand some people&#x27;s fetishization with getting darker<p>&gt; ...<p>&gt; Meanwhile most other countries and peoples are willing to damage their skin in whole other ways trying to get the opposite.<p>The grass has more melanin on the other side.
      • falcor847 hours ago
        But that&#x27;s the thing, it&#x27;s not about &quot;more melanin&quot;, but rather about something like:<p>The grass on the other side has a different amount of melanin be harder-to-achieve and thus more desirable because it previously signaled belonging to the higher socio-economical strata.
    • victor1068 hours ago
      &gt; I&#x27;ll never understand some people&#x27;s fetishization with getting darker via tanning though<p>While some darker skin people want to have lighter skin.<p>Maybe at some deeper level it’s something about being human. We always want something the other person has
      • Bridged77567 hours ago
        I&#x27;m pretty sure it&#x27;s just cultural. They don&#x27;t want to be fairer, or darker, they want the social status that it, allegedly, signals.
      • prmoustache6 hours ago
        &gt; We always want something the other person has<p>This. Same with curly vs straight hair.
    • mixmastamyk4 hours ago
      The book by Dr. Seuss, “The Star Bellied Sneetches” explorers the phenomenon.
    • fennecbutt6 hours ago
      And what&#x27;s funny is Western countries idolise tanned skin whereas Asian countries tend to idolise lighter skin.
  • Nevermark14 hours ago
    I think people way over cook themselves. The economics and amplified power of tanning beds at salons push people to highly overdose.<p>I estimated that 1 minute of artificial tanning is comparable to the 10-15 minutes of sun a day that is recommended. But has the benefit of the whole body&#x27;s largest organ kicking in for the health benefits. So I tan at home for 1 minute a couple times a week. You can&#x27;t do this economically with a salon.<p>I don&#x27;t really get tan, just a little more color. But when I do get any lengthy sun time due to outdoor activities, I tan quickly instead of burn.
    • willguest12 hours ago
      I love the idea that we believe that we can replicate all of the natural processes involved in getting a tan, and to such a precision that we can then speed up the process 10 fold, and that we can fit it all into a single unit that can be wheeled in and out of the room.<p>Unless of course our calculations are a bit off, then we accidentally created a bed version of the wrong chalice from raiders of the lost ark, but I think it&#x27;s fine.
      • crazygringo7 hours ago
        Replicate the natural processes? It&#x27;s literally just UV light.<p>UV comes in an huge variety of strengths outdoors.<p>There are no calculations to be a &quot;bit off&quot;. It&#x27;s just strong UV. You&#x27;re making it sound a lot more complicated than it is.
        • CAP_NET_ADMIN4 hours ago
          Sun also emits infrared which seems to cause positive effects counteracting some of the UV related problems.
          • crazygringo3 hours ago
            Some cell and animal studies show that there is a slight possible effect. It hasn&#x27;t been shown in humans, and even in extrapolation from animals, the protective benefit does not seem particularly significant.
        • whycome6 hours ago
          Yeah. There are so many variables already. From angle to time of year to skin pigment to duration
    • Sparkyte14 hours ago
      I just walk outdoors.
      • Nevermark14 hours ago
        Nude? :) I do think getting a bit of sun everywhere has to enhance the benefits. Thus my solution.<p>I also walk a lot when I can and weather allows. I started walking with a weighted vest occasionally and it was like my body went into some kind of good shock. I was surprised how little soreness or fatigue I felt even the first time, after a two hour walk wearing 20 lbs. And the physical energy boost was dramatic. I switched to 40 lbs the second time and since.
        • stevekemp11 hours ago
          Sure! Walk out of the sauna, over the garden, down the dock, then jump into the lake for a naked swim.<p>Do that daily for about four weeks, come rain or shine, whilst enjoying your summer vacation.<p>Of course that probably doesn&#x27;t work for every country, but here in Finland it&#x27;s normal enough. Too bad I&#x27;m a pale-skinned redhead, covered in freckles, and I get burned if I&#x27;m not too careful.
        • JumpCrisscross13 hours ago
          &gt; <i>I do think getting a bit of sun everywhere has to enhance the benefit</i><p>Why? This is not how we naturally insolate.<p>I’m not saying you’re wrong. Just that the <i>status quo</i> is different parts of your body getting sun each day. You’re not replicating that, which places the burden of evidence on you.
        • djtango12 hours ago
          Depends where you live but where I am it&#x27;s not unacceptable to go for a run in essentially swim wear so you&#x27;d be sunning not much less than what you&#x27;d get in a public tanning salon
        • medstrom12 hours ago
          There are tan-thru clothes, if you want to be serious about it.
      • loeg4 hours ago
        This isn&#x27;t super useful for UV exposure in winter, due to low angle of the sun, clouds, and of course clothing.
      • Krssst11 hours ago
        I just take vitamins if needed, saves time and no cancer.
        • hgomersall7 hours ago
          If you know something everyone else doesn&#x27;t, it would be great to see your paper describing how you do that and demonstrating efficacy. So far, the evidence seems to suggest it&#x27;s not sufficient: <a href="https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0022202X2400280X" rel="nofollow">https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0022202X2...</a>
        • sebst11 hours ago
          The tricky part is defining &quot;needed&quot;.<p>After all, supplements are also artificial compounds<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=33584011">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=33584011</a>
    • crazygringo3 hours ago
      &gt; <i>I estimated that 1 minute of artificial tanning is comparable to the 10-15 minutes of sun a day that is recommended.</i><p>That doesn&#x27;t seem right. If you only tan in a strong tanning bed for 10 min (or 15 min in a weaker one), it&#x27;s equivalent to only about an hour in the real sun around noon. I.e. if you&#x27;ve only been going to a tanning bed, you&#x27;ll start to burn outdoors shortly after that. (And I&#x27;m talking about high-UVB bulbs that develop the long-lasting tan that protects against sunburn, just like the sun itself generates.)<p>So the difference factor is more like 4-6x, not 10-15x. Honestly, 15x would be <i>insane.</i> Tanning beds aren&#x27;t as strong as some fearmongerers suggest. And that&#x27;s assuming full-body exposure.<p>When you say you artificially tan at home for 1 minute, how? Did you buy your own entire tanning bed? Because if you use the small portable devices (like a Sperti), they&#x27;re providing only a tiny fraction of what a tanning bed provides, since they&#x27;re so small.
    • pazimzadeh5 hours ago
      how do you tan at home? you bought some UVB bulbs?
  • adrianN14 hours ago
    I suppose the specifics are novel enough to warrant a paper, but on a layman’s level it has been known for decades that UV ages your skin rapidly.
    • tannhaeuser9 hours ago
      We can do better than &quot;known for decades, on a layman&#x27;s level&quot; folklore and the answer actually isn&#x27;t as straightforward ([1]). Recently there&#x27;s even been discussion (by a Brit scientist I believe but I have no reference) on skin cancer vs more serious forms of cancer, and also about skin pigmentation playing a role here.<p>[1]: <a href="https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0022202X2400280X" rel="nofollow">https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0022202X2...</a>
      • adrianN4 hours ago
        Yeah of course scientists can still learn more, but at some point the layman can’t really get any new information from the press release.
      • anon3738394 hours ago
        That link does not refute the claim that UV ages your skin, which it unquestionably does.
    • 7bit10 hours ago
      &quot;known&quot; is the wrong word. Laymen know a lot of things, like ingesting lead, radium, mercury and arsenic. Up until a couple of years ago, people &quot;knew&quot; that one glass of wine a day was healthy, when infact every drop is poisonous to the body.<p>In reverse, people thought (and too many still &quot;know&quot;) that MSG and pasteurization is bad.<p>Don&#x27;t use the word know, when in fact you mean &quot;assume&quot;.
      • loeg4 hours ago
        A glass of wine a day is within epsilon of the most healthy possible option. You&#x27;re making this out as if this is a big shift, but it isn&#x27;t. There are just huge error bars on the measurements relative to the effect of the intervention.
      • djtango10 hours ago
        Is MSG not bad for you in the way aspartame is not bad for you? I totally get that MSG is naturally present in dashi but the chemistry of dashi (a very messy and complex mix of substances) vs purified msg is going to be different, and the concentrations the japanese consume food containing dashi are very different to the way UPFs and chinese restaurants gratuitously smother your food in it. MSG is to many cuisines what butter is to western cuisine (ie moar is always bettah)
        • padjo9 hours ago
          There’s no evidence linking MSG specifically with any chronic health issues and little reason to suspect there would be in healthy people at the quantities generally consumed. Funnily enough many people who are wary of MSG and try to avoid it would be better off looking at their sodium intake, which we know for sure has long term health risks.
          • djtango6 hours ago
            Well it seems pretty accepted that refined sugar is worse for you than consuming sugars locked up in fibrous fruits. From a similar intuition glutamates locked up in natural sources probably has a different bioavailability profile to refined MSG, incidental sodium intake notwithstanding.<p>In any case, everyone is different and catchall health advice lacks nuance. I have to very consciously consume more and more salt because I habitually cut it out to the point that I now suffer from hyponatremia especially as I exercise and sweat bucket loads.
          • Noaidi5 hours ago
            I am someone who is sensitive to MSG and the new substitutes they put in food to replace it.<p>It is not &quot;dangerous&quot;, and I think that is the problem with the messaging, but it does increase my anxiety, insomnia and fibromyalgia symptoms. And I also thing for most people it is fine, but it certainly does not work with my family&#x27;s genetics. My mother had the same issue.<p>Many things in food now replace MSG. Any time you see a protein isolate, what they are isolating is the glutamate. Malted Barley Flour also contains high levels of glutamate and purines (like inosine) that work synergisticly with it to enhance flavor.<p>Glutamate is an excitatory neurotransmitter, and it makes your taste buds more &quot;excited&quot;. My mouth tastes like metal whenever I have foods with glutamate. It is not pleasant for me at all.<p><a href="https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC9883458&#x2F;" rel="nofollow">https:&#x2F;&#x2F;pmc.ncbi.nlm.nih.gov&#x2F;articles&#x2F;PMC9883458&#x2F;</a><p><a href="https:&#x2F;&#x2F;www.eurofins.com&#x2F;media-centre&#x2F;newsletters&#x2F;food-newsletter-nr44-march-2014&#x2F;flavour-enhancers-in-food-products&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.eurofins.com&#x2F;media-centre&#x2F;newsletters&#x2F;food-newsl...</a>
          • jtbayly9 hours ago
            salt is bad again?
            • loeg2 hours ago
              Salt&#x27;s bad if you have sodium-responsive hypertension (maybe 30% of the population).
            • shlant8 hours ago
              salt was always advised to be limited, especially for those with high blood pressure. This hasn&#x27;t changed, there are just vocal diet ideologues (mostly carnivore&#x2F;keto) that are trying to post-hoc rationalize otherwise.
              • loeg2 hours ago
                Only ~50% of the population is hypertensive, and only about half of them are sodium sensitive.
              • amanaplanacanal5 hours ago
                From what I understand it&#x27;s only really a problem for a specific set of high blood pressure folks. Something genetic I think.<p>I&#x27;m on blood pressure medication, and haven&#x27;t received any advice about sodium intake.
        • throwup2383 hours ago
          MSG is very safe in normal quantities with a similar safety profile to salt. You can drink MSG water to kill yourself but it’d be like drinking a gallon of seawater. It’s monosodium glutamate. Monosodium as in NaCl (table salt) and glutamate as in the amino acid and neurotransmitter. Once they disassociate in water, they’re both some of the most basic molecules used by all life, including for protein production.
        • sallveburrpi10 hours ago
          MSG is only bad for you because it makes things taste amazing so you are going to eat more than you actually should. Nothing wrong with butter btw.<p>As with most food stuffs if not consumed in moderation it can become a problem.
    • baxtr10 hours ago
      I don’t think it’s super straightforward. Another thing laymen know: Most younger people in southern Europe don’t look old.
      • blell10 hours ago
        I actually live in southern Europe and most of my friends who are &gt;35 and have been out and about for most of their lives do indeed look much older than they are.
      • brabel10 hours ago
        I think that’s because locals have some level of adaptation to their region. In Australia, you can really see how the high levels of sunshine affect the Northern Europe descendants who live there today. Some 30 yo women look easily 40.
  • drooopy15 hours ago
    There was this lady who started going to the tanning salon across the street from my place. In 4-5 months her skin had turned from pale white into tanned leather. It was shocking watching this happen.
    • SoftTalker3 hours ago
      Yeah very similar story. A friend of my wife&#x27;s started tanning and now she looks like an old bag of brown leather. Too much is never enough for her.
    • eduction6 hours ago
      Isn’t that precisely the expected outcome of going to a tanning salon?
      • Tempest19816 hours ago
        Shockingly unnatural, I assume, not shocking scientifically.
  • hereme8887 hours ago
    The UVB portion of sunlight indirectly increases dopamine levels. You find it mainly near noon-day sunlight, and tanning beds. So the feel-good effects may encourage users to come back for more.
    • kevin_thibedeau7 hours ago
      Frequent tanning bed users all have this addict level rationalization for using them when everyone knows it&#x27;s harmful.
  • horizion20253 hours ago
    &quot;The young tanning bed users had more skin mutations than people twice their age, especially in their lower backs, an area that does not get much damage from sunlight but has a great deal of exposure from tanning beds.&quot;<p>So in other areas than the lower back, everyone - tan bed users or not - have these supposed seeds of melanoma as well? And that is for a much larger area of the skin than the one mentioned.<p>Also I wonder about the quote that a mutated cell can never go back. The immune system could kill the mutated cells and thereby promote the unmutated ones. Though nothing is perfect of course. <a href="https:&#x2F;&#x2F;www.ucl.ac.uk&#x2F;news&#x2F;2020&#x2F;jan&#x2F;analysis-protective-lungs-cells-replenish-ex-smokers-reducing-cancer-risk" rel="nofollow">https:&#x2F;&#x2F;www.ucl.ac.uk&#x2F;news&#x2F;2020&#x2F;jan&#x2F;analysis-protective-lung...</a>
    • scotty793 hours ago
      &gt; The immune system could kill the mutated cells and thereby promote the unmutated ones.<p>This happens all the time. The mutated cells we see are the ones that immune system couldn&#x27;t detect and kill. Fortunately they are still overwhelmingly non-cancerous, but unfortunately some might be.
      • horizion202551 minutes ago
        Yes I agree, I was just responding the article&#x27;s &quot;“We cannot reverse a mutation once it occurs, ...&quot; I don&#x27;t think that is entirely accurate. Also, I think it is a dynamic process, so even cells the immune system hasn&#x27;t killed yet could be found later. Or the mutation could cause other deviancies that will make the cell uncompetitive with healthy cells. But it is a slow process - it takes years for former smokers&#x27; lung cancer risk to return to near that of never smokers. And it probably never gets there - some mutated cells may never be detectable and there&#x27;s clearly also a threshold beyond which the cancer is irreversible, at least without intervention.
  • yoan92244 hours ago
    The UV damage from tanning beds has been well documented for decades, but what&#x27;s novel here is the genetic methylation analysis showing accelerated aging at the DNA level.<p>What&#x27;s wild to me is the economics. Tanning salons charge $30-50&#x2F;month to give you skin cancer. Meanwhile vitamin D supplements cost $10&#x2F;year and achieve the same health benefit people claim to seek from tanning.<p>The only rational argument I&#x27;ve heard for controlled UV exposure is building a base tan before vacation to prevent burning. But even then, 1-2 minutes in a low-wattage bed would suffice - not the 20+ minute sessions people actually do.
    • alistairSH4 hours ago
      Where are you seeing vitamin D supplements for $10&#x2F;year? That’s several orders of magnitude less than most OTC supplements.
      • thwarted3 hours ago
        A Google search for vitamin d results in ads, ahem &quot;sponsored results&quot;, for 180 servings for $27, which is about $55 for a full year assuming it&#x27;s one serving per day, which is the same decimal order of magnitude as $10 (but, I suppose, since we are on HN, is three or four orders of magnitude in binary)
  • erelong3 hours ago
    I thought the healthy consensus was to get a little of actual sunlight on the skin for vitamin D production and other things
  • riazrizvi5 hours ago
    It’s like someone wrote an article in 1992 and finally decided to submit it.
    • viking1235 hours ago
      It&#x27;s news for many Americans.
      • loeg4 hours ago
        No it isn&#x27;t.
  • feverzsj3 hours ago
    This reminds me of the &quot;Tanning Mom&quot;.<p>[0] <a href="https:&#x2F;&#x2F;edition.cnn.com&#x2F;2013&#x2F;02&#x2F;26&#x2F;justice&#x2F;new-jersey-tanning-case" rel="nofollow">https:&#x2F;&#x2F;edition.cnn.com&#x2F;2013&#x2F;02&#x2F;26&#x2F;justice&#x2F;new-jersey-tannin...</a>
  • ekjhgkejhgk7 hours ago
    If you travel around you can see with your own eyes that countries that have both A) more sun and B) culture of intentional exposure (e.g. at the beach) people by the age they&#x27;re 40 have on average noticeably worse skin. More wrinkles, more dark patches etc.
  • breve13 hours ago
    Why go to the expense of a tanning bed when you can get skin cancer for free.
    • hbogert12 hours ago
      Geographically this is unpractical at some locations. Mild understatement. Do you happen to live in a year round sunny place?
      • ImHereToVote10 hours ago
        This is true. As a society we often overlook the barriers to get skin cancer in many communities.
        • hbogert21 minutes ago
          The tongue in cheek is strong in this one ^
    • Tempest19815 hours ago
      My job requires me to work indoors during high-UV hours. But I&#x27;ll look into weekend exposure, thanks!
    • doubled1127 hours ago
      It’s currently -10C with 50km&#x2F;h wind gusts. The cloud cover suggests I’ll see some snow today. There is no sun.<p>I’ll lend you my balcony if you want to try for a tan. Do you think it will happen before sunset? That’s 430pm and it is currently 10:30am.
  • Bridged77567 hours ago
    What a stupid thing. Probably on par with people bleaching their skin with chemicals.
    • doubled1127 hours ago
      But my b-hole is b-hole coloured and what if somebody sees it?
  • qubex10 hours ago
    As a naturist I’ve always wondered whether there’s a difference in prevailing skin cancer rates, but I’ve never found any data.
  • jwpapi14 hours ago
    How does this compare to Melatonan peptide?
    • chrisco25511 hours ago
      Melanotan makes your skin react to light more effectively and you can get a full tan quite quickly with it (even in a few days). I don&#x27;t know whether that means it ages you less because it takes less UV exposure to get a good tan with it or if it has some other adverse side effect. But I have tried it once and it is definitely effective.
  • Noaidi5 hours ago
    Most of you would not even be close to guessing the top ten states with the highest skin cancer rates.<p>Utah Minnesota Vermont Arizona Iowa Idaho New Hampshire South Dakota Nebraska Kentucky<p><a href="https:&#x2F;&#x2F;statecancerprofiles.cancer.gov&#x2F;incidencerates&#x2F;index.php?stateFIPS=00&amp;areatype=state&amp;cancer=053&amp;race=00&amp;sex=0&amp;age=001&amp;stage=999&amp;year=0&amp;type=incd&amp;sortVariableName=cirank&amp;sortOrder=asc#results" rel="nofollow">https:&#x2F;&#x2F;statecancerprofiles.cancer.gov&#x2F;incidencerates&#x2F;index....</a><p>Skin damage, and skin cancer, is not just about the sun. It is about genetics and nutrition as well.
  • faangguyindia12 hours ago
    After workout, i sit in the mild sun each morning before having my breakfast and have done so for many years now. I live near Himalayas and sun is always there, except for some weeks of winter.
    • iwontberude11 hours ago
      It’s not just the working out — it’s the sun lounging that has really made you comprehend the differences.
    • xandrius11 hours ago
      And?
      • Xiol11 hours ago
        He&#x27;s very fit but looks like he&#x27;s 120 years old.
  • everyone12 hours ago
    I live in Ireland, there&#x27;s practically 0 opportunity to get exposed to the sun unless you work outdoors, and even then only your face and hands and perhaps forearms get exposed. I just take vitamin D tablets.<p>Also I know UV goes through clouds, but when its raining all the time you tend to stay indoors and only go outside with raincoat &#x2F; umbrella.
  • deadbabe7 hours ago
    In my experience, people who tan know this but the argument is always they don’t care it’s part of life and it’s better to just enjoy now than spend time worrying about looking wrinkly in the future, because what’s the point of being old and having smooth perfect skin?<p>Fucking stupid, there is nothing better in life than looking young and beautiful forever IMO.
    • viking1236 hours ago
      Most people can barely think a month ahead, they will wake up one day and be like oh shit why do I look so old and panic hard and do all sorts of surgeries, skin creams etc. nonsense while they could have just avoided the sun or used the suncreen..
      • deadbabe4 hours ago
        Most people thinking aging is something that happens to other people, but that they will always pass for 20 something. Then they get offended when you <i>correctly</i> guess their age in the late 30s or 40s.
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