what contains tannins
Tannins: Any of a broad group of plant-derived phenolic compounds characterized by their ability to precipitate proteins. Tannins are found in many fruits, berries, nuts, beans, beverages, breads, smokes, herbs and spices.They are in part responsible for the bitter, astringent tastes of black tea and many wines and beers.Phenolics (of which tannins are a subgroup) are found in perfumes, fragrances, paints, petroleum products, household and industrial cleaners, and many food dyes (both natural and artificial).hey are in part responsible for the bitter, astringent tastes of black tea and many wines and beers. Phenolics (of which tannins are a subgroup) are found in perfumes, fragrances, paints, petroleum products, household and industrial cleaners, and many food dyes (both natural and artificial).