Collagen production and antioxidant defense.
Some good studies
Photo: Kampus ProductionDrag to turn · 12 heavy atoms · PubChem CID 54670067
Ascorbic acid. Drag to turn it.
What the research says
Vitamin C does not prevent colds in the general population, but regular use may modestly shorten them. Most trials found no lower cancer risk from vitamin C supplements.
High doses can cause diarrhea, nausea and cramps, and people with hereditary hemochromatosis should avoid high doses.
About "most pills": NIH ODS: regular intakes of at least 200 mg a day were studied for colds; no typical label dose could be verified from the page.
Sources: ods.od.nih.gov
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