Ergothioneine is an imidazole-containing amino acid that cannot be synthesized by the body itself, but can only be absorbed from the diet through its transporter protein, OCTN1, and is enriched in certain tissues and cells of the body. A large number of in vitro studies have shown that exogenous Ergothioneine can protect cells from oxidative apoptosis by scavenging active oxygen and nitrogen, so it can be used as a cell protector.At the First International Ergothioneine Conference,Bernie Landes, president of Oxis Inc., USA, spoke highly of Ergothioneine, "Ergothioneine is probably the most powerful and effective antioxidant ever produced.It is 6,000 times more powerful than vitamin E.The potential benefits for skin, immune regulation, cognitive function, eyes, lungs, reproduction, and overall health are unparalleled at all stages of aging." Many branded cosmetics use Ergothiamine as an important whitening and anti-aging ingredient.