Polyphenol antioxidants inhibit iron absorption

Polyphenol antioxidants inhibit iron absorption: "University Park, Pa. — Health benefits from polyphenol antioxidants — substances found in many fruits and vegetables — may come at a cost to some people. Penn State nutritional scientists found that eating certain polyphenols decreased the amount of iron the body absorbs, which can increase the risk of developing an iron deficiency."