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Source Naturals, Niacin, 100 mg, 250 Tablets

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In Stock
  • Expiration Date: Apr 2020
  • Shipping Weight: 0.24 lbs (0.11 kg)
  • Product Code: SNS-00502
  • UPC Code: 021078005025
  • Package Quantity: 250 Tablets
  • Dimensions: 1.8 x 1.8 x 3.3 in, 0.2 lbs (0.09 kg)
Product Overview


  • Dietary Supplement
  • Vitamin B-3

Niacin plays an essential role in the activities of various enzymes involved in the metabolism of carbohydrates and fats, the functioning of the nervous and digestive systems, the manufacturing of sex hormones, and the maintenance of healthy skin.

Suggested Use

1 tablet daily. Please see Note before using.

Other Ingredients

Microcrystalline cellulose, dibasic calcium phosphate, stearic acid, colloidal silicon dioxide, and magnesium stearate.

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.


Caution: If you are pregnant, may become pregnant, or breastfeeding, or you have diabetes, liver dysfunction or ulcers, consult your health care professional before using this product.

Note: Niacin may cause temporary flushing, tingling, skin reddening and sensations of heat, especially if taken on an empty stomach. This is a natural and harmless reaction.

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
Niacin 100 mg 500%
Calcium 21 mg 2%
iHerb Customer Reviews

Niacin good for your mood

Posted by 5171795616068876308 on Oct 19, 2016

After reading about niacin and its impact on arthritis, mental health issues etc. (See Andrew Saul - niacin), we are finding some wonderful improvements in our health and mood since starting to take megadoses of niacin. Since niacin will help with circulation you should expect to feel a flushing hot sensation that does not last for very long (up to 45 minutes) and this may be accompanied by itchy skin during the flush.

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Good suppliment

Posted by Reviewer1713298 on Jun 20, 2016

I take i for better cholesterol ratios and it really works. Between 100-300 mg my HDL increased by 10-12%, ldl went down by 5%. Between 500-800 HDL increased by 22% and ldl went down by 21%. ApoB down by 14% All this in 5 months.

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Less of a tingle

Posted by 5134696866210806423 on Feb 17, 2016

I take extra niacin whlle I'm addressing an adrenal fatigue problem. I did run out for a while, and within a couple of days was suffering from insomnia again. Turns out that a niacin deficiency can cause insomnia! Go figure! Anyways, I used to get another Nature's Plus Niacin, but decided to try this as its better value for money. Initially I wasn't sure if it was working, until I had my supplements on an empty stomach, and sure enough there was the tell-tale red flush tingle in my face. Feels weird but its a comfort to know its working. It is slightly less tingly than the previous brand though. Not sure if that's any indication of strength or effectiveness. But I'll be sticking with this one anyway. I'm taking half a day, to top up my one-a-day B-complex capsule.

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Not potent enough.

Posted by TriedandTested on Jan 10, 2016

Had to take many tablets before a flush was felt. Will try capsules next time.

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can't take it

Posted by beafawcett on May 03, 2015

I bought this to use as a 'methyl mop' when using methylfolate. unfortunately for me it seems that niacin burns my stomach. even small doses are intolerable and this product doesn't give ways to control amounts. it also seems very hard to find apprpopriate small doses for my purpose. it seems some of us have this difficulty so it is worth mentioning.

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