Betanin is a red pigment present in beets, Swiss chard, amaranth leaves, and other plants. It is used as the food dye beetroot red. See: beetroot red.
Betanin is an antioxidant that may protect cholesterol from oxidative stress.
Betanin can cause urine to appear pink or red.
Beets, Swiss chard, amaranth greens, cactus pear fruit, beetroot red
The American Journal of Clinical Nutrition