Bananas
Bananas, which originated in the Indo-Malaysia region, are the fourth largest fruit crop in the world. The levels of tannins in green bananas range from 122.6 mg to 241.4 mg. As bananas ripen, the tannin content decreases and becomes part of the pulp. Current research indicates that condensed tannins are also in the cell walls, which are a suitable source of natural antioxidants that are biologically accessible in the stomach.