Quercetin, an antioxidant flavonoid found in onions and apples, has been found to increase performance in athletes.
If you’re planning a big day of spring skiing, consider ingesting some quercetin before you head out. Quer-sah-who? Quercetin (kha-where-sah-tin) is an antioxidant flavonoid found in onions and apples. Several studies have found that this antioxidant powerhouse—commonly used for seasonal allergies—increases performance in athletes.