Highest Quality Supplements Since 1980

This item is not available for purchase over the web or is obsolete.


  • Item Catalog Number: 00484

Vitamin C, or ascorbic acid, is a white, crystalline, water-soluble substance found in citrus fruits and green vegetables. As an antioxidant, vitamin C scavenges free radicals in the body and protects tissues from oxidative stress.15-18,21-24 Vitamin C also promotes the absorption of iron, while preventing its oxidation.19,20,25-27 Vitamin C is a vital co-factor to the formation of collagen, the connective tissue that supports arterial walls, skin, bones, and teeth.22-27

More vitamin C is contained in the adrenal glands than any other organ in the body and is required at higher levels during times of stress.28,31 Physical stresses on the body such as ingestion of heavy metals,32-37 cigarette smoking,38-41 infections,45 extreme temperatures,46-50 and chronic use of certain medications such as aspirin also signal the need for increased intake of vitamin C.51

This TwinLab® product contains a unique calcium-bound ascorbate complex. This is a non-acidic form of vitamin C that may have a longer serum half-life than regular ascorbic acid.62-66 The product also contains a citrus bioflavonoid complex.



Supplement Facts

Serving Size 1 tablet

Servings Per Container 100

Amount Per Serving

Ester-C calcium ascorbate

1100 mg



Vitamin C

1000 mg

Elemental calcium

100 mg

Citrus bioflavonoid complex

200 mg

Other ingredients: cellulose, croscarmelose sodium, vegetable based stearic acid, dicalcium phosphate, triacetin, magnesium silicate, caruba powder, purified water.
100% vegetarian tablets. Free of sugars, salt (sodium), wheat, starch, yeast, dairy, artificial colors, flavors and preservatives.

Dosage and Use
  • One or more tablets daily with a meal is suggested, or as directed by a healthcare practitioner.


Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer.