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21st Century


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  • Swanson Premium
  • Overall Rating: 4.7 out of 5  (16)
  • 250 mg 250 Caps
  • Retail $9.49
  • Swanson $4.79
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500 mg 110 Tabs
  • 21st Century Niacin

  • Helps convert food into energy

  • No Sugar, Salt, Yeast, Preservatives, Artificial Flavors or Colors
21st Century Niacinamide helps convert food into energy for your body. It also maintains the health of the skin, digestive and nervous systems.

Product Label

Supplement Facts

Serving Size 1 Tablet

  Amount Per Serving % Daily Value
Niacinamide 500 mg 2,500%
Calcium (as Calcium Carbonate) 160 mg 16%

Other Ingredients: Cellulose, Hydroxypropyl Methylcellulose, Stearic Acid, Silicon Dioxide, Magnesium Stearate.

Directions: Take one (1) tablet daily with any meal for maximum daily results, or as directed by your healthcare provider. Do not exceed recommended dosage.

Keep out of reach of children. Do not use if product appears to be tampered with or seal is broken. Store at room temperature.

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

Terms and Ingredient Definitions

21st Century Niacinamide Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Niacinamide 3.5 5 1 2
Difficult to swallow Whereas I use several 21st Century products, and this one was exactly what I was looking for, I was not prepared for the "horse pill" size. I even tried cutting it in half and the sheer bulk of the pill caused swallowing problems. I'm sure it may be fine for someone who can swallow large pills, but because I couldnt test these properly, I overall rated them at a 3. I will continue to shop for something more suitable. November 12, 2012
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