7
votes
Accepted
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 ...
- 6,887
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 ...
- 15.8k
6
votes
Accepted
How much Vitamin D does the body produce if you're out for a whole summer day?
Vitamin D is produced in the skin by UV irradiation of 7-dehydrocholesterol. But vitamin D in the skin is also broken down by UV irradiation and this leads to a maximum equilibrium level of vitamin D ...
- 2,260
5
votes
Does light reset your circadian rhythm through your eyes or skin?
Circadian rhythm maintenance begins with intrinsically photosensitive retinal ganglion cells (ipRGC's). In the retina, you have the traditional rod and cone cells that are responsible for vision. ...
- 51
5
votes
Accepted
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 ...
- 3,194
5
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 ...
- 6,772
3
votes
Accepted
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, ...
- 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 ...
- 201
2
votes
Accepted
Does light reset your circadian rhythm through your eyes or skin?
From the CDC
The circadian rhythm is reset from the eye.
- 149
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 ...
- 302
1
vote
Accepted
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.
- 13.2k
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: ...
- 706
Only top scored, non community-wiki answers of a minimum length are eligible