Vitamin B6 is also needed for normal immune system function by maintaining the health of your thymus, spleen and lymph nodes. Vitamin B6 is also required for normal nervous system function.
Daily Requirements
Males
1 to 3 years 0.5 mg per day
4 to 8 years 0.6 mg per day
9 to 13 years 1.0 mg per day
14 to 30 years 1.3 mg per day
31+ years 1.7 mg per day
1 to 3 years 0.5 mg per day
4 to 8 years 0.6 mg per day
9 to 13 years 1.0 mg per day
14 to 30 years 1.3 mg per day
31+ years 1.5 mg per day
Vitamin B6 supplements have been recommended for relief of carpal tunnel syndrome, depression, headaches and premenstrual syndrome. However, research hasn't provided sufficient evidence for these recommendations. Vitamin B6 supplements will reduce homocysteine levels in your blood, though supplementation does not appear to reduce the risk of cardiovascular disease.
Taking large amounts of supplemental vitamin B6 may result in nerve damage. The Institute of Medicine established 100 milligrams per day as the upper tolerable intake level.
Vitamin B6 is found naturally in a variety of foods such as fish, meat, beans and legumes and many vegetables. Supplementation should not be necessary.
Sources:
Office of Dietary Supplements. "Dietary Supplement Fact Sheet: Vitamin B6." NIH. Updated 08/2007.
Food and Nutrition Board. "Dietary Reference Intakes." Institute of Medicine. Published 2004.

