if you wear a very high spf it also has a potential to block vitamin d which is obviously important so you need to make sure your not completely deprived of sunlight
“Studies have never found that everyday sunscreen use leads to vitamin D insufficiency. In fact, people who use sunscreen daily can maintain their vitamin D levels.”
“High-SPF sunscreens are designed to filter out most of the sun’s UVB radiation, since UVB damage is the major cause of sunburn and can lead to skin cancers. UVB wavelengths happen to be the specific wavelengths that trigger vitamin D production in the skin. Nonetheless, clinical studies have never found that everyday sunscreen use leads to vitamin D insufficiency.2,18,19 In fact, the prevailing studies show that people who use sunscreen daily can maintain their vitamin D levels18,19
One of the explanations for this may be that no matter how much sunscreen you use or how high the SPF, some of the sun’s UV rays reach your skin. An SPF 15 sunscreen filters out 93 percent of UVB rays, SPF 30 keeps out 97 percent, and SPF 50 filters out 98 percent. This leaves anywhere from 2 to 7 percent of solar UVB reaching your skin, even with high-SPF sunscreens. And that’s if you use them perfectly.“
“Sunscreen prevents sunburn by blocking UVB light. Theoretically, that means sunscreen use lowers vitamin D levels. But as a practical matter, very few people put on enough sunscreen to block all UVB light, or they use sunscreen irregularly, so sunscreen's effects on vitamin D might not be that important. An Australian study that's often cited showed no difference in vitamin D between adults randomly assigned to use sunscreen one summer and those assigned a placebo cream.“
https://www.skincancer.org/healthy-lifestyle/vitamin-d/damage
https://www.health.harvard.edu/staying-healthy/6-things-you-should-know-about-vitamin-d
thank you for leaving this comment who knew I'd get so educated about skin care here
As an avid sunscreen lover and user, I don’t really think this information is entirely true. A higher spf don’t cause bad things to your skin??? Technology has gotten so much better?? I’m using a CHEMICAL sunscreen rn that’s 47 SPF (HIGHER THAN WHAT THAT GUY SAID AND MORE “SIMULATING”) and it’s amazing?? Absolutely no white cast, extremely light weight, easy to use and apply, doesn’t feel greasy at all, hydrating for my dry af skin and not irritating at all even tho my skin incredibly acne-prone. It’s like $20 and it’s liquid gold. Not to mention it’s actually recommended to people wear a MINIMUM spf of 15 for day to day wear (and remember to reapply). So that thing where he said to wear spf 30 or lower is in the opposite direction. SPF 30 lets about 3% of UVB rays through and SPF 50 lets 2% of UVB rays through, so just know that you are more protected with a higher spf than just 30. Also y’all should wear spf everyday because UVA rays are eVERYWHERE RAIN OR SHINE. I mean skin cancer? Who has that when you have sunscreen?? Premature aging?? Who dat? Burning and redness?? Never heard of her. Sunscreen is great. You should find one that works for you. I’m using Krave Beauty’s The Beet Shield. Research. Protect yo skin. Keep your skin cells healthy. That’s all.