Added to Cart
Cart Total:
Customers Also Bought:
24/7 Help

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

$8.09 $8.09 (Saved $6.41)

Thank you!

Your email is being processed.

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

Our Price:
You Save:
$6.41 (44)
  • Quantity Discount
  • Buy 4+
    Save 5%
  • Buy 12+
    Save 10%

Sorry, this product is no longer in stock.

Earn 5% Loyalty Credit ?

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

In Stock
  • Expiration Date: Mar 2021
  • Shipping Weight:
    0.24 lbs
    Switch to Metric units
  • Product Code: SNS-00504
  • UPC Code: 021078005049
  • Package Quantity: 250 Tablets
  • Dimensions:
    3.4 x 1.8 x 1.8 in, 0.2 lbs
    Switch to Metric units
Combo Offer!
Save $2.00 when you purchase these items today for only $13.09
Together: $13.09

Sorry, this product is no longer in stock.

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


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

forme métabolisée de la B3 plus facile, plus rapide et sans effets indésirables

Thanks for your feedback!

Gentle on stomach, doesn't raise blood sugar

Posted by KentuckyWildcat on Jan 20, 2017 | Verified Purchase

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.

Thanks for your feedback!

No flush

Posted by iHerb Customer on Mar 24, 2015 | Verified Purchase

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

Thanks for your feedback!

Good B3

Posted by iHerb Customer on Oct 15, 2014 | Verified Purchase

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

Thanks for your feedback!

Using for anxiety

Posted by Romero on Jan 29, 2014 | Verified Purchase

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

Thanks for your feedback!