There's more to citrus than just vitamin C! Citrus fruits contain natural compounds known as bioflavonoids, which aid the absorption of vitamin C and complement its antioxidant potency. Swansons special formula features a 700 mg citrus bioflavonoid complex including hesperidin plus Acerola cherries, rose hips and rutin. It's the perfect companion for your daily vitamin C supplement, or great all by itself!