Published human research

In a double-blind crossover pilot, hydrogen-rich water was associated with lower exercise-related lactate and less early decline in muscle torque. Oxidative-injury markers and creatine kinase did not significantly change. The small sample limits how broadly the results apply.

Aoki K et al. Pilot study: effects of drinking hydrogen-rich water on muscle fatigue caused by acute exercise in elite athletes. Medical Gas Research. 2012;2:12. DOI: 10.1186/2045-9912-2-12.

Participants drank 1.5 liters daily of hydrogen-rich or plain water. Researchers observed differences in some blood-cell and inflammatory-response measures. Overall changes in several antioxidant and oxidative-stress markers did not differ between groups; one antioxidant finding was confined to an age subgroup.

Sim M et al. Hydrogen-rich water reduces inflammatory responses and prevents apoptosis of peripheral blood cells in healthy adults: a randomized, double-blind, controlled trial. Scientific Reports. 2020;10:12130. DOI: 10.1038/s41598-020-68930-2.

This randomized trial reported improvements in several glucose, lipid and inflammatory markers with a specific high-concentration hydrogen-water regimen. It studied adults with metabolic syndrome, not a general healthy population. It does not establish weight-loss or disease-treatment benefits for Active H2 Ultra.

LeBaron TW et al. The effects of 24-week, high-concentration hydrogen-rich water on body composition, blood lipid profiles and inflammation biomarkers in men and women with metabolic syndrome: a randomized controlled trial. Diabetes, Metabolic Syndrome and Obesity. 2020;13:889–896. DOI: 10.2147/DMSO.S240122.

A randomized crossover study found that acute pre-exercise hydrogen-rich water did not improve running performance at maximal aerobic speed. Together with positive trials, this shows why the activity, dose and timing matter—and why a study result should not become a guarantee.

Valenta M et al. Acute pre-exercise hydrogen rich water intake does not improve running performance at maximal aerobic speed in trained track and field runners: a randomized, double-blind, placebo-controlled crossover study. PLOS ONE. 2022;17:e0279307. DOI: 10.1371/journal.pone.0279307.