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11 votes

Do we produce Vitamin D in the shade?

The exact value depends on a lot of things - skin tone, the time of day, latitude, how deep the shade is,... The study Vitamin D effective ultraviolet wavelengths due to scattering in shade found ...
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7 votes

Do we produce Vitamin D in the shade?

About 1/4 - it varies with the reflectivity of the surface, and angle of the sun. Detailed study is at http://www.ncbi.nlm.nih.gov/pubmed/20199222
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5 votes
Accepted

Why do most of an average person's UV exposure from the sun occur before the age of 18?

The statistic is false, though there's something meaningful behind it. From Godar et al, 2003: Since 1986, people have been informed that they get about 80% of their lifetime ultraviolet (UV) dose by ...
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5 votes
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Do UV-B emitting lamps for reptile pets produce vitamin-D in human skin?

In short: UV bulbs for reptiles and tanning beds emit mainly UV-A, which does not promote vitamin D synthesis but can promote skin cancer. UV light and vitamin D synthesis (Skin Cancer Foundation): ...
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4 votes

Does the use of sunscreen inhibit Vitamin D production?

This has been a controversial question for many years. The current evidence suggests that sunscreen does block a part of Vitamin D production, but with negligible amounts. Studies have found that ...
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  • 6,596
4 votes
Accepted

Does the damage from sun exposure outweigh the benefit of getting vitamin D?

I like your curiosity and logical thinking - you're just missing a few pieces of the puzzle. The sun emits ultraviolet light radiation which is the component of sunlight that is able to damage skin. ...
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  • 362
3 votes

Does any drug/cream help prevent DNA damage post UV exposure?

According to a paper published by the principle investigator, Dr. Brash, who was interviewed in the article linked in the question: We document the ability of [acetyl zingerone] in vitro to prevent ...
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  • 2,424
3 votes
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Is it advisable to wear UV protected swimsuit that covers arms and legs for skin protection to an outdoor swimming pool?

As critiqued in comments, this answer possibly misrepresents the vitamin D situation, which is better described here. Proceed with suspicion! Summary Because of the associated cancer risk, ...
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  • 589
2 votes

Do UV-B emitting lamps for reptile pets produce vitamin-D in human skin?

I don’t know if they can be used, but they shouldn’t. Recently, sun exposure is considered more and more harmful to the skin. This is why for recommended Vitamin D levels, no sun exposure whatsoever ...
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  • 6,596
2 votes

Does the use of sunscreen inhibit Vitamin D production?

In addition to the other answers: [C]linical studies have never found that everyday sunscreen use leads to vitamin D insufficiency. In fact, the prevailing studies show that people who use sunscreen ...
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  • 191
1 vote

Which studies have shown that UV radiations fail to reach some part on the mask and therefore may not be suitable for sanitizing masks?

This may not be the exact issue alluded to in your source, as it’s not caused by the shape of the mask directly, but Fisher, Williams, & Shaffer (2010) finds that the effectiveness of UV ...
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  • 218
1 vote
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Reddened in the face / red skin in the face

There are many possibilities here, but my first thought upon seeing the pictures and reading that it occurred after you increased your alcohol consumption was rosacea. It can be triggered by alcohol ...
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  • 237

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