Myth-buster
Zinc for radiation mouth sores: a meta-analysis of 332 patients found oral supplements came close to statistical significance but didn't cross the line (p=0.055), while topical mouthwash did show a clear benefit.
This is an early, provisional finding — the first indexed meta-analysis on this specific question — so it introduces a genuine contradiction with the idea that 'zinc works' regardless of how you take it, but the picture is too sparse to treat it as settled.
The meta-analysis found that taking zinc tablets or capsules did not reliably reduce severe mouth sores from radiation therapy — the result fell just short of statistical significance. In contrast, using zinc as a mouthwash did lower the risk, suggesting that how you take it matters more than whether you take it at all.
Where this fits in the evidence
This is among the first studies we've indexed on Zinc for Reduced Severe Oral Mucositis Incidence — treat it as an early signal until more research accumulates.
The study
- Meta-Analysis
- n = 332
- 2026-06-21
- Current oncology (Toronto, Ont.)
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.