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Supplement$17.99◆ Editor's Pick
Kirkland Vitamin C 500 mg
Tracked by a member and shared to the feed.
Evidence
5/5
Multiple meta-analyses confirm vitamin C reduces common cold duration by ~8% in the general population and by ~50% in people under extreme physical stress (athletes, military recruits). Supplementation also shows modest benefits for wound healing and immune markers. However, high-dose supplementation does not prevent colds in most people, only shortens them once symptomatic.
Mechanism
Vitamin C (ascorbic acid) is a water-soluble cofactor for collagen synthesis, iron absorption, and antioxidant defense. It regenerates other antioxidants like vitamin E and supports immune cell function, particularly neutrophil and T-cell activity.
Best evidence type
✓
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END OF DAY · MMXXVI
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