Heart Disease Home > Vitamin C Supplements

Vitamin C is a water-soluble vitamin that is most commonly known for its antioxidant activity. However, it may also provide benefits in immune function and iron absorption. It is used for preventing and treating numerous conditions, including the common cold. However, not all uses of vitamin C have evidence to support their effectiveness.
Vitamin C is generally safe for most people, but high doses may cause side effects in certain situations. Side effects that may occur with high-dose vitamin C supplementation include heartburn or indigestion, vomiting, and insomnia.
(To read the full-length article about these supplements, click Vitamin C.)
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Last reviewed by: Arthur Schoenstadt, MD
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