The peptides, which are increasingly marketed as providing longevity and health benefits, were removed in 2023 from the agency’s list of products that compounding pharmacies can sell.
Some peptides, like insulin, have long been used as treatments, but many others have received little study and much remains unknown about their benefits or harms.
Sin Tung Chan was a member of a prominent hometown association in the city, one of hundreds of social clubs that often maintain close ties with the Chinese government.