Vitamin C and colds
Key points
- Despite the popular belief that vitamin C can cure the common cold, the scientific evidence for this is limited.
- A few studies suggest that taking vitamin C supplements at the beginning of cold symptoms, or just after possible exposure, can shorten a cold or ward it off altogether.
- However, most studies conclude that vitamin C does not prevent or treat the common cold.
- Vitamin C may only be useful in case of a cold if you have low levels of this nutrient to begin with.
Alternative names
Colds and vitamin C
Information
Despite the popular belief that vitamin C can cure the common cold, the scientific evidence for this is limited. A few studies suggest that taking vitamin C supplements at the beginning of cold symptoms, or just after possible exposure, can shorten a cold or ward it off altogether.
However, most studies conclude that vitamin C does not prevent or treat the common cold. Vitamin C may only be useful in case of a cold if you have low levels of this nutrient to begin with. The likelihood of success may be very individual - some people improve, while others do not.
People with kidney disease should avoid vitamin C supplements. Most experts advise that you meet your daily vitamin and mineral requirements by eating a balanced diet.
Written and revised by
David Cohen, M.D.
Our doctors write and review articles for accuracy and keep them up to date.
health.am provides general information, not medical advice. Always consult a qualified health professional about your own health.