Bioflavonoids , although not considered vitamins in its truest sense, are sometimes referred to as vitamin P (P stands for capillary permeability factor).
Bioflavonoids are important factor in the absorption of vitamin C, and should be taken together.

Bioflavonoids are used extensively in the treatment of athletic injuries because they relieve pain, bumps, and bruises. They can contribute to pain reduction in the legs or across the back, and reduce symptoms associated with prolonged bleeding and low serum calcium.

Bioflavonoids have an antibacterial effect and promote circulation, stimulate bile production and treat and prevent cataracts.

When taken with vitamin C, bioflavonoids also reduce the symptoms of oral herpes.

Bioflavonoids help to strengthen veins and capillaries and may be helpful in preventing vericose veins.