Shifting Sentiment on the Sun

If you’re among those who are diligent about skin protection, you might be (rightfully) confused by recommendations to expose yourself to UVB rays in order to absorb vitamin D. After all, they're the ones believed to cause most skin cancers. The fact is, there isn’t any evidence that daily sunscreen use of a moderate SPF contributes to vitamin D deficiency, which means it (most likely) doesn’t significantly interfere with your body’s ability to synthesize the vitamin. So when you plan to spend a lot of time in the sun, you can keep on using the expert-recommended 30 SPF without worrying too much about impeding vitamin D production.