500 mg 100 capsules, Item# 00372
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Many B vitamins are used in the body individually or in combination with enzymes to help release energy from carbohydrates, fat, and protein. Vitamin B coenzymes are crucial to the metabolic pathways that generate the energy needed by every cell in the body. Because they are codependent in their metabolic activities, a deficiency of one B vitamin can affect optimal functioning of organ systems throughout the body.153
Niacin is the only B vitamin that can be synthesized in the liver from the amino acid tryptophan — on average, 1 mg of niacin can be synthesized from the ingestion of 60 mg of tryptophan.188-190 In its coenzyme forms, niacin is crucial to energy transfer reactions, particularly the metabolism of glucose, fat and alcohol.191,192 Niacin’s beneficial effect on blood lipids is well-documented.193-206
Serving Size 1 capsule
Servings Per Container 100
Niacin (vitamin B3)
500 mg
Other ingredients: gelatin, vegetable stearate.
This product contains NO milk, egg, fish, peanuts, crustacean shellfish (lobster, crab, shrimp), soybeans, tree nuts, wheat, yeast, gluten, corn, or rice. Contains NO sugar, and no artificial sweeteners, flavors, colors, or preservatives.
Temporary flushing, itching, rash, or gastric disturbances may occur. Liver function testing is recommended when niacin is taken in excess of 500 mg daily. Those with gout or liver diseases should avoid taking high doses of niacin.
Niacinamide is another B3 vitamin that does not cause flushing.
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(based on 4 reviews)
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(1 of 1 customers found this review helpful)
I rather enjoy the flush!
By Janet, a LEF advocate
from York PA
About Me First Time User, Health Conscious
See all my reviews
Comments about Life Extension Vitamin B3 Niacin, 500 mg 100 capsules:
Some people don't like the flush you get with niacin, but I enjoy it...I know it's working!
Comment on this review
Niacin B3
By Jim
from St. Louis
About Me Health Conscious
Have used this product for a long time and it continues to fulfill my needs.
I will continue to buy this product.
By Clarence
from Casselberry, FL 32707
About Me Health Conscious, Medical Professional
The product is effective and does what I expected.
Great product for reducing cholestrol
By Janet, LMT
from Long Island, NY
I take this product in the morning with a fruit smoothie. The flushing would bother me in the beginning but no longer is an issue.