Is Indigo Powder Safe?
The Short Answer: Yes, provided it is pure, organic Indigofera tinctoria leaf powder. The safety concerns regarding "indigo" usually refer to two distinct things: synthetic industrial dyes used for denim (which can contain aniline) or "Black Henna" containing PPD. Pure cosmetic-grade indigo leaf powder is non-toxic and safe for topical use. The Origin of ...

