Vitamin C effectiveness for common colds remains limited

Scientific evidence suggests that vitamin C is not an effective tool for preventing the common cold in the general population. A Cochrane review of 29 studies involving over 11,000 participants found no significant protective effect against catching a cold, though regular intake may slightly reduce the duration of symptoms in adults by approximately eight percent.

Medical experts note that once symptoms like a sore throat or runny nose appear, the infection cannot be stopped. These symptoms are the result of the immune system already responding to a viral load that has been present for some time. While taking vitamin C after symptoms begin shows no clear benefit, regular supplementation prior to illness may offer a minor reduction in recovery time.

Other common remedies, such as ginger shots, hot tea, or warm baths, do not prevent infection but may provide psychological comfort by offering a sense of control during illness.