Zinc is a safe, familiar, and reliable element. Long used on babies’ bottoms as an anti-infl ammatory in cases of severe diaper rash and used equally often on lifeguards’ sun-burned noses, zinc has a familiar place in medicinal history. Microaerosolized zinc is a clear cousin of the older white pasty version. It provides the broadest spectrum of any sun protection ingredient and is the only ingredient safe enough to use on children under six months of age.