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21st Century, C-1000, Prolonged Release, 110 Tablets

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$1.35 (15)
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In Stock
  • Expiration Date: Apr 2019
  • Shipping Weight: 0.53 lbs (0.24 kg)
  • Product Code: CEN-21225
  • UPC Code: 740985212257
  • Package Quantity: 110 Tablets
  • Dimensions: 5.8 x 2.5 x 1.7 in, 0.45 lbs (0.2 kg)
Product Overview


  • Vitamin Supplement
  • 10% Free
  • Helps Neutralize Free Radicals and Supports A Healthy Immune System
  • Guaranteed Quality - Laboratory Tested

Vitamin C is an important antioxidant nutrient that helps neutralize free radicals which may cause cellular damage in the body. Vitamin C also supports a healthy immune system. 21st Century prolonged release Vitamin C-1000 provides long-term vitamin supplementation by slowly releasing nutrients to the body over an extended period of time.

Suggested Use

As a vitamin supplement, take one (1) tablet daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.

Other Ingredients

Hydroxypropyl methylcellulose, stearic acid, cellulose, calcium carbonate, silicon dioxide, magnesium stearate.

No added sugar, salt, yeast, preservatives, artificial flavors or colors.


Consult a healthcare provider prior to use if: pregnant, nursing, on medications, have a medical condition or are planning a medical procedure. Stop use and contact a physician if adverse reactions occur.

Keep out of reach of children.

Do not use if product appears to be tampered with or seal is broken. Store at room temperature.

Supplement Facts
Serving Size: 1 Tablet
  Amount Per Serving % DV
Vitamin C (as Ascorbic Acid) 1000 mg 1667%
Percent Daily Value (DV).
iHerb Customer Reviews


Posted by 5198141525171177014 on Aug 26, 2016


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Posted by 5753287768818936436 on Jun 26, 2016

This is good value for money and it works well. I will continue buying.

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Posted by 5432224756990642894 on Jun 10, 2016

Great value for money and it's getting hard to find slow release vita C.

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first use

Posted by 4718222663755619629 on May 10, 2016

I use this for the first time I take the test, half a tablet in the morning half of the afternoon after eating I feel more energy, fatigue disappears quickly. all OK.

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Careful this has bad fillers

Posted by 4687625283566591700 on Jan 24, 2016

Im having bad reactions to this, please research the fillers in this product... I have been sick for a week and blamed another med, so did the elimination thing. Reintroduced this and now im sick again. bin for this muck.

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