Questions tagged [sun-exposure]

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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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4 votes
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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 ...
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3 votes
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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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2 votes
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Do bearded faces age slower?

Recent research indicates that UV exposure may be responsible for around 80% of facial skin aging symptoms. The more unprotected exposure from the sun, the more the skin ages. Does the evidence show ...
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2 votes
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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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Safe UV exposure time

How long can our body be exposed to UV to not cause health problems like skin cancer, etc,. In some parts of the USA, the UV index can reach High (7-9). I'm trying to understand if I need to stay ...
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1 vote
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How dangerous for the human skin are naturally occurring wavelengths above 380nm?

I read on https://www.cancer.org/cancer/cancer-causes/radiation-exposure/uv-radiation.html: UVA rays have the least energy among UV rays. These rays can cause skin cells to age and can cause some ...
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1 vote
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Is it better to tan for 10 minutes without sun protection or the equivalent x amount of minutes with sunscreen?

For tanning efficiency purposes (i.e. getting as tanned as possible with as little skin damage as possible) is it better to tan for 10 minutes without sunscreen or the equivalent x amount of minutes ...
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1 vote
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How long can a fair skinned person be safely exposed to the sun without sunscreen?

I realize the answer to this question varies with the time of day (most recommendations are to avoid exposure between 10am and 2pm), latitude, altitude, medication and other factors, and goes as far ...
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1 vote
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Relationship between UPF/SPF and reduction in UV damage

I'm trying to untangle the relationship between the UPF/SPF rating of clothing or sunscreen and its effectiveness at reducing health risks from exposure to sunlight. The first complication is that a ...
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