Well, it's not quite as cut and dry as that. While human and animal studies have shown that vitamin C does significantly improve immune function,[1] over 40 ye

Well, it's not quite as cut and dry as that. While human and animal studies have shown that vitamin C does significantly improve immune function,[1] over 40 years of research suggests that routine vitamin C supplementation does not prevent the common cold but modestly reduces its duration and severity in the general population, and halves the risk of catching a cold in people exposed to extreme physical stress, while the few therapeutic trials of vitamin C treatment of the common cold have been inconsistent.[2][3] https://en.wikipedia.org/wiki/Vitamin_C_and_the_common_cold https://en.wikipedia.org/wiki/Vitamin_C_and_the_common_cold