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Source Naturals, Niacinamide B-3, 100 mg, 250 Tablets

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In Stock
  • Expiration Date: Jun 2020
  • Shipping Weight: 0.24 lbs (0.11 kg)
  • Product Code: SNS-00504
  • UPC Code: 021078005049
  • Package Quantity: 250 Tablets
  • Dimensions: 3.4 x 1.8 x 1.8 in, 0.2 lbs (0.09 kg)
Product Overview


  • Dietary Supplement

Niacinamide, also known as vitamin B-3, functions in over 50 metabolic reactions, most of which are enzymatic. Its bioactive forms - NAD+, NADH, NADP, and NADPH - play important roles as catalysts in the energy production process in the cells, the breakdown of proteins and fatty acids, the synthesis of fatty acids, and the formation of steroid hormones and red blood cells.

Suggested Use

1 tablet daily.

Other Ingredients

Dibasic calcium phosphate, microcrystalline cellulose, stearic acid, and silica.

Suitable for vegetarians and Hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.


Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 1 Tablet
  Amount Per Serving %DV
Niacinamide 100 mg 500%
iHerb Customer Reviews

Gentle on stomach, doesn't raise blood sugar

Posted by KentuckyWildcat on Jan 20, 2017

Regular flushing niacin is very acidic and can upset your stomach, plus it can raise blood sugar, especially in higher doses. Taking niacin as niacinamide avoids those problems. Niacin (vitamin B3) will do different things and have different effects in the body depending on what form is used. I use this niacinamide to help synthesize NAD enzymes and also as a GABA agonist.

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No flush

Posted by Reviewer2932503 on Mar 24, 2015

Husband objected to the flush. This version seems to keep him contented.

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Good B3

Posted by 5109157552070576586 on Oct 15, 2014

I use it occasionally when I need a relative low dose of Niacinamide. Works as advertised.

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Using for anxiety

Posted by Romero on Jan 29, 2014

I`m using for anxiety, I`m enjoying, but I`m taking with Nicotinic acid too.

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Source Naturals Niacinamide.

Posted by Reviewer3327975 on Jul 25, 2011

Excellent service with my order, good pricing. The product is fine and I was pleased that it was not gel caps. It's early to tell whether the product is accomplishing what I want to accomplish, but I have no reason to believe that it won't.

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