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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: 08/2019
  • 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
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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

Not for everybody

Posted by iHerb Customer on Oct 14, 2017 | Verified Purchase

My wife took one tablet B3Niacin in the evening of 21of September. 40 minutes laterher body became dark-red, she burned inside,and itching all over. I helped her into the bath,and there she sat for about 20 minutes in Cold water,while I called an ambulance. She told the doctor what sort of pils she had taken. Luckely this story has a happy ending for my wife and me, but it was very scary. So these tablets do not fit everybody.

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Posted by iHerb Customer on Oct 02, 2017 | Verified Purchase

I had previously used Niacin tablets for "flushing" purposes some years ago. This time however on my third dose I experienced a severe flushing experience so went to do some research online where I read that high niacin doses may cause nausea which I was then feeling and a drop in blood pressure for those who suffer from hypotension. I attempted to stand & go to the bathroom when I blacked out and luckily my husband found me not long after as I was choking. Needless to say I will not be taking any more and advise that this product should be taken under doctor's supervision. May be useful for anyone with hypertension.

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True niacin

Posted by iHerb Customer on Sep 28, 2017 | Verified Purchase

If your looking for the real thing, this brand will give you the niacin flush. Be careful though, it's strong. I halved the dose by buying empty gel caps and dividing the mixture.

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huge side effect experienced

Posted by iHerb Customer on Sep 13, 2017 | Verified Purchase

I bought and ate this product just one time and went to the hospital. All over my face, neck and hands got rash after about 10 mins. Also my body temperature got high. The doctor said that I was experiencing the side effect. As soon as I got home, I threw this product into the trash can. It was the first experience of the kind I have ever had. No thanks.

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

I get a warm feeling and flush face when i took the first. one should consider that before takeing i will not order more of t his item

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