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Life Extension, Vitamin B3 Niacin, 500 mg, 100 Capsules

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Life Extension, Vitamin B3 Niacin, 500 mg, 100 Capsules

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Life Extension, Vitamin B3 Niacin, 500 mg, 100 Capsules

In Stock
  • Expiration Date: 02/2019
  • Shipping Weight:
    0.24 lbs
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  • Product Code: LEX-37210
  • UPC Code: 737870372103
  • Package Quantity: 100 Capsules
  • Dimensions:
    3.9 x 2.1 x 2.1 in, 0.2 lbs
    Switch to Metric units
Frequently Purchased Together
Product Overview


  • Promotes Cardiovascular Health
  • Dietary Supplement

Vitamin B3 Niacin

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.

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. In its coenzyme forms, niacin is crucial to energy transfer reactions, particularly the metabolism of glucose, fat, and alcohol. Niacin's beneficial effects on blood lipids is well-documented.

Suggested Use

Read the entire label and follow the directions carefully prior to use.

Take one (1) capsule daily with meals, or as recommended by a healthcare practitioner.

Other Ingredients

Gelatin, vegetable stearate.



Caution: 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.

Store tightly closed in a cool, dry place.

  • Keep out of the reach of children.
  • Do not exceed recommended dose.
  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
Supplement Facts
Serving Size: 1 Capsule
  Amount Per Serving % Daily Value
Niacin (vitamin B3) 500 mg 2500%
iHerb Customer Reviews


Posted by iHerb Customer on Dec 24, 2017 | Verified Purchase

The real deal, but too strong for me.

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Got Allergy

Posted by iHerb Customer on Dec 22, 2017 | Verified Purchase

I used to take Now's Niacin, but i changed to your brand Niacin for test trial. However, I got allergy after taking the capsules in 10-20 minutes . My body suddenly grows heat and skin area from face to abdomen get red and itching. I never have the problem before and think your capsules to the problem source. I have stopped to take it any more.

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Once in awhile for detoxification effects

Posted by iHerb Customer on Nov 16, 2017 | Verified Purchase

I only take this once in awhile- perhaps once a month for detox effects. My skin feels great and I love the tingly red prickly feeling. I also had what I thought was a small scar tissue on the side of my leg, but after taking this once on an empty stomach, the red hyper pigmentation hypertrophic area just disappeared! I also sometimes take this if I feel a cold coming on and start to feel sick. Great stuff! Taking it on an empty stomach might irritate your stomach a bit so I also drink almond milk if that happens.

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Definite improvement.

Posted by iHerb Customer on Nov 12, 2017 | Verified Purchase

My mothers Dr recommended she take B3 for her sun damaged skin. I decided to start taking it too as I have similar skin. I have noticed an improvement with my eczema and dry skin. I definitely get the flush but I am use to it now so its less distressing.

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too strong

Posted by iHerb Customer on Nov 08, 2017 | Verified Purchase

There is 2500% day value in one capsule. It's too much. It is impossible to take it, as immediately you get red and "burning".

Thanks for your feedback!