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Every Ester-C serving is 1,000 mg of vitamin C as calcium ascorbate. Compare the six formulas

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Information only

The site describes Ester-C products and vitamin C for general information. It is not medical advice. Talk to your doctor or pharmacist before you start a supplement.

Purchases

Purchases happen at our retail partner, under its terms: payment, shipping, returns and refunds are handled there. Prices on this site are from our last update and may differ from the price at checkout.

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Always read the label on the product you receive. If it differs from this site, the label on the pack is the one to follow.