Antioxidants can defend against damaging free radicals and premature aging. Antioxidants are substances that are known to neutralize free radicals within the body. Antioxidants can reduce and possibly reverse the damage caused by oxidation.
A common broad-spectrum ingredient in sunscreen are the physical blockers like zinc oxide. The development of “nanoparticle” sunscreen formulas has led to sunscreens that appear transparent and blend easily.