A group of plant pigments which are responsible for the colors of many flowers and fruits. Citrus bioflavonoids are those bioflavonoids, or flavonoids, found in citrus fruits such as lemon, orange, tangerine, grapefruit, etc. These substances possess antioxidant activities, which help fight poor health and aging. Citrus bioflavonoids have been investigated for their biological activity, with both anti-inflammatory and -carcinogenic effects being reported.