Vitamin C may be effective for several different uses. However, there is much controversy about some vitamin C uses, such as for the
common cold (see Does Vitamin C Work? for more information).
Vitamin C Dosing Information
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 vitamin C than others.
Side Effects of Vitamin C
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 With Vitamin C