Does using a sunscreen prevent absorption of needed Vitamin D?

Yes, using sunscreen does reduce the amount of vitamin D that is absorbed by the skin. When UV rays from the sun hit your skin, they react with a form of cholesterol to produce vitamin D. However, sunscreen blocks UV rays, so less vitamin D is produced.

That said, while a limited amount of UVB radiation can help create vitamin D, too much can lead to skin cancer and premature skin aging.

Therefore, it's important to find a balance that allows you to reap the benefits of sun exposure without increasing the risks. While avoiding direct sunlight during the peak hours of 10 a.m. and 4 p.m., you can get the vitamin D you need by exposing unprotected skin to sunlight for short periods. As a rule, ten to fifteen minutes of sun exposure three times per week is enough.

If you are at risk of sunburn, you can expose your face, arms, and legs for as little as five to ten minutes daily without sunscreen. Remember, the less skin that is covered, the less time you need in the sun.

If you are concerned about getting enough vitamin D, talk to your doctor, you can also get adequate amounts of vitamin D through diet and supplements.