Does sunscreen affect Vitamin D? (Part 2) #shorts
1 Sept 2023 · 1 min

0:42
Dermatologist Shereene Idriss explains that SPF 30 blocks 97% of UVB rays and SPF 50 blocks 98%, so some UV still gets through. Vitamin D deficiency has many causes beyond sunscreen use, and you should apply it anyway for skin health.
Questions this video answers
About 97% (so ~3% penetrates).
About 98% (so ~2% penetrates).










