In most cases, vitamin C supplements won't help prevent colds. However, taking vitamin C before the onset of cold symptoms may shorten the duration of symptoms. Vitamin C may provide benefit for people at high risk of colds due to frequent exposure: for example, children who attend group child care during the winter.
June 27, 2020
- Cold remedies: What works, what doesn't, what can't hurt. Mayoclinic.org. https://www.mayoclinic.org/diseases-conditions/common-cold/in-depth/cold-remedies/art-20046403. Accessed Feb. 15, 2018.