6 votes
Accepted

Does vitamin D synthesis occur in indirect sunlight?

The sunlight through the window does not stimulate vitamin D synthesis in the skin. Sunlight and Vitamin D (PubMed): Since glass absorbs all UVB radiation, exposure of the skin to sunlight that ...
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  • 15.6k
5 votes
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General Population Low Vitamin D Levels

There are a few mechanisms at work that influence the vitamin D status for Europeans. Vitamin D is either eaten in the food, created with the help of sunlight or supplemented. Many appear to net have ...
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  • 6,757
5 votes
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How is sunlight a Lupus trigger for some? What exactly about the sun often causes Lupus flare-ups?

Very interesting question. Thank you. The pathophysiology of photosensibility in lupus patients is related to the effect of ultraviolet radiation (UVR) on cells of the immune system. UVR stimulates ...
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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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  • 6,480
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

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
2 votes

For how long does the application of topical retinoids increase photosensitivity?

They increase UV sensitivity for as long as you use them, so sunscreen is recommended if doing any activity outside in the sunlight. Retinoids simply make your skin more sensitive because it ...
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1 vote
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Research paper published SARS-CoV-2 persistence and durability

The paper is here https://www.scribd.com/document/456897616/DHSST#fullscreen&from_embed It doesn't say but I presume that the Department of Homeland Security knows what sunlight is.
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1 vote

How long does it take to beat vitamin D deficiency

Ideally, people should get enough vitamin D from their food. However, that's difficult to do, Many folks don't get enough of the nutrient from dietary sources like fatty fish and fortified milk. Ref: ...
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