There are plenty of better options for sun protection today, but it is considered "safe as used" (and sunscreens are pretty well regulated) and it is available worldwide (can be used up to 10% in the EU and up to 7.5% in the US)
As pharmacist Suzy Cohen says in her book Drug Muggers: Which Medications Are Robbing Your Body of Essential Nutrients and Natural Ways to Restore Them, Any medication, whether its listed here or not, that goes through your liver can increase your requirements for this nutrient
Intriguingly, a recent study showed that exposure to sublethal hydrogen peroxide led to a long-term genome-wide decrease in DNA methylation
Classification also adapts to different development needs under the same function
Aydemir TB, Chang SM, Guthrie GJ, Maki AB, Ryu MS, Karabiyik A, et al