Natural Factors Citrus Bioflavonoids - 650 mg - Bioflavonoids enhance the absorption of Vitamin C, and they work synergistically to protect and preserve the structure of the capillaries. The body does not produce Bioflavonoids, so they must be supplied by either diet or supplementation. Used extensively to treat athletic injuries and to relieve pain and bruises, they have also shown good results in lessening prolonged bleeding, promoting circulation, stimulating bile production and lowering cholesterol levels. Taken in conjunction with Vitamin C, Bioflavonoids have also had good results in protecting against viral infections, and symptoms of oral herpes. Bioflavonoids are also useful in management of asthma and stomach ulcers, intestinal problems and food allergies.