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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)
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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

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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Good for nerves and good for arthritis, but not for cholesterol.

Posted by Reviewer1097755 on Jun 12, 2011

Very effective for calming nerves and anxiety, without inducing fatigue or dulling one's mind (works at doses from 300 mg to 600 mg three times a day). It also works well in reducing arthritic pain (at doses as low as 300 mg once a day). But, people should know that this form of vitamin B3 does not effect cholesterol levels--for that, you need the Niacin form.

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