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Limited evidenceLongevity & antioxidants

Molecular Hydrogen Tablets

Tablets that release hydrogen gas into water, sold as a selective antioxidant. Meta-analyses of small trials find inconsistent effects on oxidative stress and modest changes in blood lipids; nothing yet supports the broader health claims.

Evidence last reviewed: August 2026

What the science says

  • Exercise-induced oxidative stress Limited evidence

    A systematic review and meta-analysis of trials in healthy adults found hydrogen supplementation did not consistently reduce markers of exercise-induced oxidative stress. Included studies were few, small and highly heterogeneous in dose and protocol.

  • Blood lipids in metabolic disorders Limited evidence

    A 2026 meta-analysis of randomized trials in adults with overweight, obesity or related metabolic disorders reported improvements in some lipid fractions with hydrogen-rich water. The pooled trials were small, short and mostly from a narrow set of research groups.

Dosage & safety

Studied doseTrials typically dissolved one tablet in 250–500 mL of water once or twice daily, delivering roughly 5–15 mg of hydrogen per day. Drink promptly after dissolution as the gas escapes quickly.
SafetyNo serious adverse effects reported in short trials; hydrogen is not toxic at these amounts. Most tablets are magnesium-based, so high intakes can cause loose stools, and the magnesium load matters for people with kidney impairment. Long-term data are absent.

Scientific references

Where to buy

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