Bioflavonoids are a group of substances also known as flavonoids. They are found in plant pigments in every vascular plant and give flowers and foods their yellow, orange or red colour. Hesperidin, rutin and quercetin are examples are bioflavonoids.
Bioflavonoids are considered to have antioxidant properties, help strengthen capillaries and assist the absorption of vitamin C.
Why you may need bioflavonoids
Bioflavonoids improve venous tone, reduce normal capillary permeability and reduce inflammation so may be useful to relieve haemorrhoids, varicose veins, nose bleeding and bruising.
How much do you need?
An Australian RDI has not been established.
Bioflavonoids are generally well tolerated. There have been some reports of headaches, rashes, flushing and mild gastrointestinal upsets.
Symptoms of deficiency
Deficiency symptoms that may arise include easy bruising, poor circulation, bleeding nose and lowered immunity.
The best dietary sources of bioflavonoids include buckwheat, citrus fruits, red wine, apples and berries.
Other reasons why you may need more
There are some factors and conditions that increase the need for bioflavonoids, these include malabsorption disorders such as coeliac disease, increased intake of vitamin C, cigarette smoking, stress and air pollution.