Vitamin C
debunked vitamin C for colds — popular belief, evidence says otherwise
Evidence by outcome
skingrade Clow certainty— topical better-supported than oral; oral may support collagen synthesis
cold preventionstudied, no effectmoderate certainty— no reduction in cold incidence in the general population
moodstudied, no effectmoderate certainty— Not recommended for unipolar depression
People say · Evidence shows
“Vitamin C prevents colds”
contradictsextremefolk
What changed
- C → null-result (2026-04-12) — Meta-analysis confirmed no prevention benefit in the general population; regraded to null-result.
Compare
- Vitamin C vs Vitamin D for mood
- Vitamin C vs St. John's Wort for mood
- Vitamin C vs 5-HTP for mood
- Vitamin C vs Saffron for mood
- Vitamin C vs N-Acetylcysteine for mood
- Vitamin C vs Omega-3 for mood
- Vitamin C vs Creatine for mood
- Vitamin C vs Zinc for mood
- Vitamin C vs Probiotics for mood
- Vitamin C vs Turmeric for mood
- Vitamin C vs Folate for mood
- Vitamin C vs Myo-Inositol for mood
- Vitamin C vs Magnesium for mood
- Vitamin C vs Rhodiola for mood
- Vitamin C vs Zinc for cold prevention
- Vitamin C vs Collagen for skin
- Vitamin C vs Zinc for skin
More
sources: PMID:42095579 · PMID:00000008 · PMID:35311615