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Natural Factors, Niacin, 100 mg, 90 Tablets

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Natural Factors, Niacin, 100 mg, 90 Tablets

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Natural Factors, Niacin, 100 mg, 90 Tablets

In Stock
  • Expiration Date: 03/2020
  • Shipping Weight:
    0.12 lbs
    Switch to Metric units
  • Product Code: NFS-01220
  • UPC Code: 068958012209
  • Package Quantity: 90 Tablets
  • Dimensions:
    2 x 2 x 3.7 in, 0.1 lbs
    Switch to Metric units
Frequently Purchased Together
Product Overview


  • Dietary Supplement
  • Support For Energy Production
  • Purity & Potency Guaranteed
  • Isura Non-GMO- Mass-Spec - Documentation - Lab Tested

Niacin (vitamin B3) is essential to the metabolism of carbohydrates, fats and protein, which contributes to an increased energy production and normal nervous system function. it may also help regulate cholesterol levels already in normal range and support healthy adrenal gland function.

Suggested Use

1 tablet 1-5 times per day with food or as directed by a health professional.

Other Ingredients

Microcrystalline cellulose.

Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada.

Contains no artificial colors, preservatives, or sweeteners; no dairy, starch, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs. Suitable for vegetarians/vegans.


Caution: As with any supplement, consult your health professional before use if you are pregnant, breastfeeding, or trying to conceive, or if you are taking medication, have a medical condition, or anticipate a surgery. People sensitive to nicotinic acid may experience flushing of the skin that is generally mild and transient. Do not exceed the recommended dose except on the advice of a health professional. Keep out of the reach of children.

Sealed for your protection. Do not use if seal is broken. For freshness, store in a cool, dry place.

Supplement Facts
Serving Size: 1 Tablet
  Amount Per Serving %Daily Value
Niacin (vitamin B3) 100 mg 500%
iHerb Customer Reviews

This may cause flushing

Posted by iHerb Customer on Feb 16, 2018 | Verified Purchase

I'm sure the vitamin is fine, but expect flushing unless you take it on a full stomach. I took the first one about an hour after lunch, which was a light lunch. Big mistake! Had I not read about flushing, I probably would have called 911!

Thanks for your feedback!

Niacin reaction

Posted by iHerb Customer on Jan 15, 2018 | Verified Purchase

Be carefull, Niacin may cause blood flashing.

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Temporary relief for atherosclerosis

Posted by iHerb Customer on Dec 17, 2017 | Verified Purchase

The flush makes it work for hardening of the arteries....keeps them veins wide open, max use calls for no more than 2 or 3 tablets per day. Works much better than timed release versions.

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Posted by iHerb Customer on Nov 01, 2017 | Verified Purchase

This is the simple form of Niacin that does flush the body and is good to use with detoxing combined with the sauna

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Niacin Flush May Occur!

Posted by iHerb Customer on Oct 19, 2017 | Verified Purchase

I took this product for the very first time before I was due to leave for work and I would NOT recommend doing this as I had a HUGE Niacin Flush reaction occur all over my body! So begin with perhaps 1/4 of a tablet and do it at a time you may not have to leave the house for an hour! In saying that, hot flush left body within 40 minutes - so all good!

Thanks for your feedback!