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Vitamin C

Is It Effective?

Vitamin C may be effective for several different uses. However, there is much controversy about some uses, such as for the common cold (see Does Vitamin C Work? for more information).
 

Dosing Information for Vitamin C

Both RDAs (recommended dietary allowances) and UL (tolerable upper limit) dosing recommendations are available for vitamin C. Some people (such as smokers) may need more than others.
 
(Click Vitamin C Dosage for more information.)
 

Side Effects

Most people do not experience side effects with vitamin C (at normal doses). However, some people may experience side effects (especially with high doses), including, but not limit to:
 
(Click Vitamin C Side Effects to learn more, including potentially serious side effects that you should report immediately to your healthcare provider.)
 

Drug Interactions

Vitamin C can potentially interact with a few medications (see Vitamin C Drug Interactions).
 
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Vitamin C Supplements

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