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21st Century, Oyster Shell Calcium 500 + D3, 400 Tablets (Discontinued Item)

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21st Century, Oyster Shell Calcium 500 + D3, 400 Tablets (Discontinued Item)


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21st Century, Oyster Shell Calcium 500 + D3, 400 Tablets (Discontinued Item)

Out of Stock - Discontinued
  • Shipping Weight:
    1.77 lbs
    Switch to Metric units
  • Product Code: CEN-22727
  • UPC Code: 740985227275
  • Dimensions:
    3.2 x 3.2 x 6.6 in, 1.5 lbs
    Switch to Metric units
Product Overview


  • Value Size
  • Dietary Supplement
  • Super Value
  • Extra Vitamin D††
  • Compare to Active Ingredients in Os Cal 500 +D

Regular exercise and a healthy diet with enough calcium helps teen and young adult Caucasian and Asian women maintain good bone health and may reduce their high risk of osteoporosis later in life. Adequate calcium intake is important, but daily intakes above about 2,000 mg are not likely to provide any additional benefit. Now with extra Vitamin D. Vitamin D is essential for use of calcium and necessary for healthy bones, teeth and cartilage.

††Compared to the original formula.

Suggested Use

As a dietary supplement, take two tablets daily with any meal, or as directed by your healthcare provider. Do not exceed recommended dosage.

Other Ingredients

Cellulose, croscarmellose sodium, polyvinyl alcohol, titanium dioxide, stearic acid, PEG, talc, magnesium stearate, artificial colors (FD&C Blue #1, FD&C Yellow #5). Contains a shellfish ingredient (oyster shell).

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


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: 2 Tablets
Servings Per Container: 200
  Amount Per Serving % DV
Vitamin D3 (as Cholecalciferol) 800 IU 200%
Calcium (from Oyster Shell) 1000 mg 100%
Percent Daily Value (DV).
iHerb Customer Reviews


Posted by iHerb Customer on Dec 17, 2013 | Verified Purchase

good price for such a number of tablets.

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Wonderful product.

Posted by iHerb Customer on Nov 20, 2013 | Verified Purchase

For me it is the best product with calcium and D3.

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Balance of Calcium & Vit D

Posted by shawnlim88 on Sep 07, 2012 | Verified Purchase

good balance of calcium & VitD

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Good for the price

Posted by iHerb Customer on Aug 16, 2012 | Verified Purchase

It's good. But not easy to swallow.

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Posted by iHerb Customer on Feb 06, 2012 | Verified Purchase

higher calcium, low unit price

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