Tannin source can refer to three different things: ACACIA, WINE, and SUMAC. ACACIA is a genus of shrubs and trees that are native to Africa, the Middle East, and parts of Australia. The bark and leaves of these plants contain tannins, which are used in various industries such as tanning leather and dyeing fabrics. WINE is also a source of tannins, as it is made from grapes that contain tannins. Finally, SUMAC is a type of flowering plant that is native to North America and parts of Asia. Its berries contain tannins, which are used in traditional medicine and as a food preservative.