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21st Century, Niacin Inositol Hexanicotinate, 500 mg, 110 Capsules

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In Stock
  • Expiration Date: Jun 2019
  • Shipping Weight: 0.3 lbs (0.14 kg)
  • Product Code: CEN-27089
  • UPC Code: 740985270899
  • Package Quantity: 110 Capsules
  • Dimensions: 1.8 x 2.4 x 3.7 in, 0.25 lbs (0.11 kg)
Product Overview


  • 10% Free
  • Flush Free
  • Dietary Supplement
  • Helps Convert Food into Energy and Helps Maintain Skin, Digestive & Nervous Systems
  • Gluten Free
  • Manufactured in an FDA Inspected Facility
  • 21st Century-For a Healthier Future

Niacin (Vitamin B3) plays a key role in converting food into energy and helps maintain the healthy function of the nervous system, the digestive system and the skin. Niacin as Inositol Hexanicotinate is a good source of Vitamin B3 without the flushing effect associated with Niacin.

Suggested Use

Take one (1) capsule daily with any meal for maximum daily results, or as directed by your healthcare provider.

Other Ingredients

Gelatin, silicon dioxide, magnesium silicate, cellulose, magnesium stearate.

Unconditionally guaranteed for purity, freshness and label potency. No added sugar, salt, yeast, preservatives, artificial flavors or colors.


Do not exceed recommended dosage.

Keep out of reach of children.

Not intended for pregnant or nursing women.

Do not use if product appears to be tampered with or seal is broken.

Store at room temperature.

Supplement Facts
Serving Size: 1 capsule
  Amount Per Serving %DV
Niacin (as Inositol Hexanicotinate) 400 mg 2000%
Inositol (as Inositol Hexanicotinate) 100 mg **
**Percent Daily Value (DV) not established.
iHerb Customer Reviews


Posted by 5157118776243505664 on Dec 01, 2016

Yeah, my doctor had me on slo Niacin but I got killer flashes. This stuff apparently metabolizes into Niacin but even the large dose (500mgx2) doesn't cause the flashes. Dr says it's OK.

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Good Product

Posted by Reviewer1045112 on Dec 01, 2016

I can feel the difference when taking Niacin, more energy.

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Good product

Posted by 5027900243561377188 on Jul 05, 2016

Flush free. Perfect to take at night.

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Posted by 4911540176425895905 on Aug 31, 2015

我吃維生素B3時,都是把膠囊外殼給去除後吃下粉末, 這個品牌的粉末過於粗造,應該還再研磨的細小一些。

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Bin sehr zufrieden.

Posted by 5358607621145122547 on Jan 24, 2014

Jederzeit wieder.

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