The Claim
Vitamin C supplementation reduces the severity of cold symptoms by 13% (95% CI 5–20%) in healthy individuals, as evidenced by 7 comparisons from 5 trials involving 975 participants and 1739 cold episodes.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Taking vitamin C pills might make your cold symptoms less severe if you're a healthy person.
See the scientific wording
Vitamin C supplementation reduces severity measured by symptom scales by 13% (95% CI 5–20%) in healthy individuals, based on 7 comparisons from 5 trials with 975 participants and 1739 cold episodes.
What the research says
1 studyStudy: Vitamin C reduces the severity of common colds: a meta-analysis
The study shows vitamin C reduces cold severity by about 15%, which supports the claim that it reduces severity by 13%, so it's a good match.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.