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230 points mgh2 | 1 comments | 06 Sep 25 19:57 UTC | HN request time: 0.227s | source

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Tepix ◴[06 Sep 25 21:48 UTC] No.45153183[source]▶

I've found that wearing SPF 50 is way too much for me, even in the tropics. SPF20 and being careful and seeking shade after a while is sufficient. Remember SPF 20 means you can stay in the sun 20 times longer than normal!

I only use SPF 50 for my nose.

replies(3): >>45153232 #>>45153254 #>>45153874 #

1. LeoPanthera ◴[06 Sep 25 23:34 UTC] No.45153874[source]▶

>>45153183 #

> Remember SPF 20 means you can stay in the sun 20 times longer than normal!

No it doesn't. It means you will receive 1/20th of the UV. That is not the same.

https://www.fda.gov/about-fda/center-drug-evaluation-and-res...

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Over 80% of sunscreen performed below their labelled efficacy (2020)