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21st Century, B-12, Prolonged Release, 1000 mcg, 110 Tablets

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In Stock
  • Expiration Date: Mar 2019
  • Shipping Weight: 0.18 lbs (0.08 kg)
  • Product Code: CEN-21104
  • UPC Code: 740985211045
  • Package Quantity: 110 Tablets
  • Dimensions: 1.8 x 2.4 x 3.7 in, 0.15 lbs (0.07 kg)
Product Overview


  • 10% Free
  • Vitamin Supplement
  • Promotes Tissue Growth & Maintenance and Is Essential for Red Blood Cell Formation
  • New! Easy to Swallow Smaller Tablet
  • 21st Century...For a Healthier Future
  • Gluten Free
  • Laboratory Tested - Guaranteed Quality

21st Century Vitamin B-12 (Cyanocobalamin) promotes maintenance and growth of tissue and is essential for red blood cell formulation. Prolonged release vitamins slowly release nutrients into the body over an extended period of time.

Suggested Use

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

Other Ingredients

Cellulose, stearic acid, hydroxypropyl methylcellulose, silicon dioxide, magnesium stearate.

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


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 B-12 (as Cyanocobalamin) 1000 mcg 16667%
Calcium (as Calcium Carbonate) 100 mg 10%
†Percent Daily Value (DV) based on a 2,000 calorie diet.
iHerb Customer Reviews

Exceptional value for money !

Posted by Reviewer3333596 on Feb 12, 2014

Great product at exceptional price. TOP value for money !

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Posted by 5488881324633768672 on Dec 01, 2013


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Posted by Reviewer1356117 on Nov 23, 2013

This stuff is great. Lots of Energy, no tummy aches. If you are especially worried about not getting enough b12 because you are on a vegetarian/vegan/raw diet, this is a great supplement!

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Not good incredients

Posted by Reviewer2646612 on Nov 14, 2013

These helped me for a while (placebo?), but I needed to change to other label. Cyanocobalamin isn't a good ingredient as it solubles to badly on others.

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Posted by 5193447888805415830 on Aug 01, 2013

So far so good, only had it for 2-3 days and can feel more energy.. also super fast delivery, normal delivery in 5 working days and i only paid $4 for the whole order!!! Well done iHerb!!

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