Cosmetics were used in ancient Egypt not just for beauty but also for health and hygiene. Eye makeup like kohl, containing lead salts, was believed to have protective properties against eye diseases, thanks to its antibacterial qualities. What's fascinating is modern science suggests that, in minute quantities, lead salts may indeed stimulate the immune system to fight off bacteria, possibly proving the ancients right! Have any surprising beauty facts or historical tidbits? Please share your insights with us!