I'm new to cosmetics analysis and looking for cheats for these products. I need information today about illegal preservatives used in cosmetic shampoos and creams. I know that preservatives such as hydroquinone, formaldehyde and thiazolinones are used. But I don't know about other illegal preservatives that are being used recently.
In addition to the type of preservative, in what materials used in these products, is it possible to cheat?