Vitamin B6 refers to a family of three closely related, water-soluble compounds: pyridoxine, pyridoxal, and pyridoxamine. The conversion of vitamin B6 into the active compound of pyridoxal-5-phosphate occurs naturally in the body. Vitamin B6 is involved in many processes in the body, but up to 25% of women have diets that provide less than the recommended daily intake of this vitamin. Vitamin B6 is popular with women as a pre-menstrual supplement, as it may assist in essential fatty acid metabolism and fluid balance. It is established that deficiencies of vitamin B6 can raise homocysteine levels in the blood, a factor that has been linked to cardiovascular diseases. Each tablet provides a full 50mg of vitamin B6, made in the UK in premises that operate to stringent pharmaceutical standards.