High-SPF Sunscreens: Are They Better?
When you've shopped for sunscreen, you have probably noticed products with very high sun protection factor (SPF) ratings. But is a 100+ or a 90+ sunscreen really that much better than one with an SPF of 30? SPF refers to the ability of a sunscreen to block ultraviolet B (UVB) rays, which cause sunburns, but not [...]