Vitamin C and the Cold: Debunking the Nobel Prize’s Cure Claim
Linus Pauling’s 1970s push for mega-doses of vitamin C didn’t turn into a proven cold cure. While some meta-analyses show only modest benefits—regular intake of 1,000 mg+/day may reduce severe cold symptoms by about 15% for certain groups, and some analyses note reduced severity in athletes—there’s no consistent evidence that vitamin C prevents catching a cold or shortens mild illness when started after symptoms begin. Safe upper limits vary by country (US around 2,000 mg/day; Australia ~1,000 mg/day; general daily needs about 45 mg), and high doses can cause GI issues, kidney stones, or interact with other treatments. If considering supplements, discuss with a GP and keep intake well below 1,000 mg/day. Overall, vitamin C is not a cure or a reliable preventive for colds; any benefit is small and conditional.
