Questions tagged [sunlight]

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

I read on https://www.medscape.com/viewarticle/726464_6: Owing to potential photosensitivity, topical retinoids are best applied at night and patients should not expose themselves to excessive UV ...
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1answer
40 views

Research paper published SARS-CoV-2 persistence and durability

I know that there have been other papers published, but I was specifically looking for the one referenced by Bill Bryan, an undersecretary at the Homeland Security Department, in the press briefing ...
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1answer
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How long does it take to beat vitamin D deficiency [closed]

I have had vitamin D deficiency (17 ng/mL) and I am planning on sitting in sun at noons. I am aware of that how much UVB you get depends on a few factors such as your complexion, where you live and ...
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2answers
2k views

Does vitamin D synthesis occur in indirect sunlight?

I know you don't get a tan through a glass window. But I don't know whether tanning and vitamin D are produced using identical wavelengths. So my questions are : -Do you synthesise vitamin D through ...
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1answer
160 views

General Population Low Vitamin D Levels

In the answer to Is it advisable to wear UV protected swimsuit that covers arms and legs for skin protection to an outdoor swimming pool? by @Anko, it was stated that you can get enough vitamin D from ...
6
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1answer
79 views

Is it advisable to wear UV protected swimsuit that covers arms and legs for skin protection to an outdoor swimming pool?

Is it advisable to wear UV-protected swimsuit that covers arms and legs for skin protection to ward off skin cancer? Or is it too paranoid, given that most men and women wear swimming trunks / ...
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0answers
50 views

Why do you not need sun protection whe the UV index is 3?

In Australia, they recommend sun protection when the UV index is above 3. Why is this? Surely whenever it's above 0 there are still UV rays hitting your skin? Would 10 minutes in the sun with a UV ...
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0answers
12 views

Amount of sunlight and its effect on the eye sight [duplicate]

Are there any studies or commonly understood consensus on how the amount of light and type (different types of artificial vs. sunlight) of light that an individual is daily exposed to affects their ...
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39 views

Are cheap sunglasses dangerous?

Does having any plastic between your eyes and the environment automatically provide UVA and UVB protection? Or do the lenses actually have to be coated (or be comprised of a special type of plastic) ...
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3answers
137 views

Does the use of sunscreen inhibit Vitamin D production?

Vitamin D is produced in the skin when exposed to sunlight. Therefore, when using sunscreen on the skin, is Vitamin D production inhibited?
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0answers
81 views

Test UV protection on sunglasses

I bought sunglasses in China that claims to have UV400 protection. I'd like to test this as my eyes' health is on the line :) Is there any way to check the maximum UV amount these glasses can protect ...
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2k views

One sunburn peels after 2 days, another after 2 weeks. Why?

I once did a long bike ride that burned my legs (low sun intensity/focus, long exposure time). They were immediately sore but didn't peel until 2 weeks later. I once swum a bit and burned my ...
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43 views

What to do against high Light Sensitivity?

Well, I would like to know if there is an way to decrease light sensitivity with Food/operations/technical help/change in Lifestyle or whatever. I am highly sensitive to Light since years but it ...
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0answers
16 views

How important is having an anti-reflection layer on a glass lens?

There are many factors that play a role when a person chooses their next pair of glasses. For example, I would think that the exact material of the lens would be of crucial importance. Yet, it looks ...
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1answer
386 views

How is sunlight a Lupus trigger for some? What exactly about the sun often causes Lupus flare-ups?

There are different triggers for those diagnosed with Lupus, and a common trigger is sunlight. What is it about the sunlight the causes the body to start attacking itself? Does the body not know how ...
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0answers
159 views

Craving sunlight with melatonin?

I have noticed a very strange, but positive, side effect of taking melatonin supplements or cherries high in melatonin (I have blood tests which confirmed food allergies, and apparently my absorption ...