Catechu is a substance derived from the wood of the acacia tree, particularly Acacia catechu. It is a pale yellow or brownish powder that is used in traditional medicine, as a flavoring agent in food, and in the production of inks, dyes, and tanning agents. Catechu has astringent properties and has been used historically in various cultures for its health benefits, including in the treatment of diarrhea and as a dental rinse.
