The color purple Anthocyanin is a natural pigment that occurs in fruits and vegetables such as grapes, blueberries, and sweet potatoes, and is responsible for their vibrant hue. "Although, not all purple fruits are superfoods," cautions Zhou, citing purple dragon fruit as an example.
Studies have shown that anthocyanins can help prevent cardiovascular and neurological diseases and cancer, and play a role in controlling obesity and diabetes, as they can inhibit digestive enzymes and reduce glucose levels.