Like you make sure you take B2, ensure your daily diet includes vitamin B3.
Vitamin B3 or niacin or nicotinic acid is essential for proper circulation, healthy functioning of the nervous system and proper protein and carbohydrate metabolism. It is essential for synthesis of sex hormones, cortisone, thyroxin and insulin. It is contained in liver, fish, poultry, peanut, whole wheat, green leafy vegetables, dates, figs, prunes and tomato. A deficiency can lead to skin eruptions, frequent stools, mental depression, insomnia, chronic headaches, digestives disorders and anaemia.
The recommended daily allowance is 12 to 20 mg for adults and 4.8 to 12 mg for children.Large doses of this vitamin say up to 100 mg with each meal, preferably together with other B group vitamins, affords relief in case of migraine and high blood pressure caused by nervousness, high cholesterol and arteriosclerosis.