Contents of Lutein and Polyphenol in Suioh Leaf Blades with Different Cooking Methods

摘要

"Suioh" is a new sweetpotato cultivar with edible leaves (D. The leaves taste good and are rich in nutrients (e.g., vitamins and minerals). In addition, the leaves are rich in such physiological functional components as lutein and polyphenol. Lutein is a carotenoid (a natural pigment) found in dark green leafy vegetables, such as spinach and kale. Recently, it has been confirmed that lutein reduces the risk of age-related macular degeneration (AMD) and cataracts. The main polyphenol in the leaves ofsweetpotato is caffeic acid derivatives, which have antioxidant, antihypertensive, and antidiabetic effects.