Molecular hydrogen (H2) is a colorless, odorless gas that has gained scientific attention for its selective antioxidant properties, meaning it appears to target harmful free radicals while leaving beneficial reactive oxygen species intact. Research suggests that molecular hydrogen may support the body's natural anti-inflammatory and antioxidant defenses, with studies exploring its potential benefits for exercise recovery, cognitive function, gut health, and skin vitality. Typically delivered through hydrogen-infused water tablets, electrolysis generators, or inhalation devices, H2 is notable for its exceptionally small molecular size, which allows it to penetrate cell membranes and even cross the blood-brain barrier with relative ease. While the body of evidence is growing and many findings come from animal or early human trials, the safety profile of molecular hydrogen appears favorable across the delivery methods currently studied.
Compare this supplementResearch suggests that molecular hydrogen exerts anti-inflammatory effects through multiple proposed mechanisms, incl...
View studies →Research suggests that molecular hydrogen may offer antioxidant support by selectively neutralizing harmful reactive ...
View studies →Research suggests that molecular hydrogen may support cognitive function across a range of injury and disease context...
View studies →Research suggests that molecular hydrogen may offer modest benefits for exercise recovery, though the evidence remain...
View studies →Research suggests that molecular hydrogen plays a biologically meaningful role in gut health, primarily through its p...
View studies →The studies provided do not contain research on molecular hydrogen or skin health — the linked literature covers unre...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Liquid | 1–1.6 mg | Daily | Cognitive function and neuroprotection | Based on clinical trials in mild cognitive impairment and Parkinson's disease populations |
| Liquid | 0.5–1.6 mg | Daily | General antioxidant support and anti-inflammatory effects via hydrogen-rich water | Common in clinical trials using hydrogen-rich water (600ml–2L/day at ~0.8 ppm) |
| Liquid | 0.8–1.6 mg | Daily | Gut health and metabolic syndrome support | Common in RCTs examining hydrogen-rich water effects on gut microbiota and metabolic markers |
| Tablet | 0.5–1 mg | Twice daily | Exercise recovery and oxidative stress reduction | Based on RCTs using effervescent hydrogen-generating tablets dissolved in water |
| Topical | — | As needed | Skin health and UV-induced oxidative damage | Used in preliminary studies as hydrogen-rich saline or bath solutions; standardized dosing not established |