COVID-19

25 papers

Research evidence summary

Q: Does molecular hydrogen help with COVID-19?

A: Of 25 peer-reviewed papers, 8 reported a positive effect, 2 limited/mixed, 1 negative, 14 not assessed. Study mix: 8 human (7 RCT), 0 animal/basic, 16 meta-analysis or synthesis. The most studied delivery route is inhalation. The above aggregates published research and does not constitute a clinically established conclusion. See the individual paper pages for details and Safety notes for inhalation safety. (last updated 2026-05-15)

Evidence breakdown
Human8of which RCT7
Animal/basic0Synthesis/meta16
Reported effectpositive 8 ・ limited/mixed 2 ・ negative 1 ・ not assessed 14

Read the safety notes →

Delivery-method distribution

inhalation: 11 not specified: 5 mixed routes: 5 hydrogen-rich water: 4