Sunscreen blocks the UVB rays that make vitamin D, but most people don't apply enough or reapply often enough for it to actually stop vitamin D production. Board-certified dermatologist Shereene Idriss explains the gap between theory and practice.
To all the sunscreen haters out there who think they're not going to get enough vitamin D if they use sunscreen. I'm a 39 year old board certified dermatologist and I have one word for you wrong. Why do they think this? Our bodies produce vitamin D when exposed to the sun. Uvb. Specifically, sunscreen blocks uvb. So in theory, they're right in thinking that sunscreen is going to block you from making enough vitamin D. But the reality is far from that truth. The fact of the matter is, nobody, and I mean nobody, not even yours truly included, applies enough sunscreen or reapplies it as often as they should with the right amount to cover every square inch of their body to be fully protected from the sun. I most certainly do not. I make sure my money maker's covered, but that's pretty much it on a daily basis.
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