Questions tagged [sunscreen-sunblock]

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Is there any medical upside in using a sunscreen that isn't broad spectrum (i.e., protecting against UVA and UVB)?

I read on https://en.wikipedia.org/wiki/Ultraviolet_index: Because of the way the UV index is calculated, it technically expresses the risk of developing sunburn, which is caused mostly by UVB ...
6
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1answer
156 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 ...
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0answers
21 views

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 ...
5
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2answers
226 views

How long is zinc sun block effective?

I am using "Eucerin Daily Protection, face lotion SPF 30" with zinc. The label says it is effective for 24 hours of moisturization. But does not say how long the SPF is good for. I realize that zinc ...
5
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2answers
105 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
29 views

Physical sunscreen high SPF vs high active ingredient percentage

I'm looking at two products: Product A contains active ingredients Zinc Oxide at 9.0%, and Titanium Dioxide at 7.0% for 113g. It has SPF 45. Product B contains an active ingredient Zinc Oxide at 20% ...
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0answers
19 views

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 ...