An Amazon seller, let's call her A, once updated a single line on her cosmetic product label and suddenly her listing was deactivated. It turned out that one of the ingredients in her product was added to Amazon’s new prohibited list, causing her a significant financial loss. Amazon has been rapidly tightening its regulations over the last few years. The year 2025, in particular, has seen a noticeable increase in the strictness of rules for cosmetics, dietary supplements, and