How we keep the facts current

The catalog on this site was last updated on October 25, 2026. Prices, sizes and availability are refreshed on a schedule. When a figure here and the checkout disagree, the checkout is right.

Prices and sizes

We update the price and availability of every Ester-C size in our catalog on a regular schedule. A size that is not available at the time of an update leaves the site until it returns. The price per serving is the bottle price divided by the servings the label counts.

Label facts

The Supplement Facts on each product page are set as text from the panel on the pack: serving size, amounts, % Daily Value, the citrus bioflavonoid complex, other ingredients and directions where the panel shows them. When two packs of one product print different figures, we show the figure of the pack you see in the photo and note the difference.

Health statements and their sources

Figures about vitamin C and the body come from the pages below, read on the date shown. We quote the studies of Ester-C together with their funding, and the NIH conclusion that no form of vitamin C has been shown better than the others.