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Tuna is a great source of Vitamin B-3 and grilled tuna steaks are delicious.
Taking niacin supplements with vasodilators can be dangerous.

Before beginning any supplement, speak with your doctor to find out what you really need and what combination of vitamins and minerals is best for you.

Note that niacin can produce a peculiar effect known as a "niacin flush." This is a reddish flushing of the skin on the neck, face, arms, torso, and hands.  It can produce intense itching.  It is caused by the opening of the capillaries beneath the skin and generally passes after a few minutes. If you experience a "flush," reduce the amount of niacin you are taking.
Vitamins - what they are and how they work
Vitamin B-3
Also known as : niacin

Type of vitamin : water soluble - this means that it is not stored by the body and needs to be consumed daily.

USRDA : Men - 23 mg, Women - 16 mg

Sources: Vitamin B-3 can be found in the following foods:

  • beef (3 oz tri-tip beef roast, fat removed - 164 calories) (Chili Con Carne)
  • bran (1 cup Total Raisin Bran - 170 calories)
  • chicken (1 cup diced roasted chicken - 270 calories) (Chicken with Fresh Salsa)
  • enriched bread (1 small enriched pita - 77 calories)
  • enriched pasta (1 cup cooked, enriched spaghetti plain - 270 calories) (Pasta Primavera)
  • mushrooms (1 cup stir-fried shiitake mushrooms - 43 calories) (Mushroom Pot Roast)
  • peanuts (1 oz dry-roasted, salted peanuts - 164 calories) (Thai Pork Salad)
  • seafood (3 oz steamed shrimp - 84 calories) (Italian Shrimp Salad)
  • tuna (1 cup solid white tuna packed in water, drained - 179 calories) (Tuna with White Beans)

Functions: Vitamin B-3 is necessary for:

  • conversion of food to energy
  • proper digestive tract function
  • controlling cholesterol
  • treating schizophrenia
  • treating anorexia and bulimia

Deficiencies : Vitamin B-3 deficiency (not enough) can result in:

  • dermatitis
  • diarrhea
  • mouth sores
  • pellagra

Overdose : Vitamin B-3 overdose (too much) can result in:

  • high blood sugar
  • high uric acid
  • hot flashes
  • irregular heartbeat
  • liver problems
  • ulcers


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