补充: FDA允许的防晒成分 (a) Aminobenzoic acid (PABA) up to 15 percent. (b) Avobenzone up to 3 percent. (c) Cinoxate up to 3 percent. (d) [Reserved] (e) Dioxybenzone up to 3 percent. (f) Ensulizole up to 4 percent. (g) Homosalate up to 15 percent. (h) [Reserved] (i) Meradimate up to 5 percent. (j) Octinoxate up to 7.5 percent. (k) Octisalate up to 5 percent. (l) Octocrylene up to 10 percent. (m) Oxybenzone up to 6 percent. (n) Padimate O up to 8 percent. (o) Sulisobenzone up to 10 percent. (p) Titanium dioxide up to 25 percent. (q) Trolamine salicylate up to 12 percent. (r) Zinc oxide up to 25 percent. 截至2003年4月
此外,关于防晒产品上标明的"sunscreen"和"sunblock",我曾经看到过有人认为后者一般防晒效果会好一些。从字面上看似乎是如此,但是其实并没有理论上的支持,这两个名称其实没有任何学术上的分类支持,不过是厂家的喜好。而且根据FDA 1999年5月发布的规定,已经禁止在产品标签上使用sunblock"了,以免产生误导。除此以外,被禁止使用的还有"waterproof," "all-day protection," and "visible and/or infrared light protection"