Extract & Compound · Other

Molecular Hydrogen (H2)

Provisional Moderate Scorecompound

Hermetica Superfood Encyclopedia

Published March 18, 2026Last updated March 18, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.

Review flags: AWAITING_SEMANTIC_VALIDATION

Provisional Summary

Molecular hydrogen (H2) is a selective antioxidant that specifically neutralizes hydroxyl radicals and peroxynitrite while preserving beneficial reactive oxygen species. It modulates cellular signaling pathways including Nrf2 activation and cytokine production to reduce oxidative stress and inflammation.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryExtract & Compound

GroupOther

Public Score StatusProvisional Moderate

Primary Keywordmolecular hydrogen benefits

Molecular Hydrogen close-up macro showing natural texture and detail — rich in antioxidant, anti-inflammatory, cytoprotective

Molecular Hydrogen (H2) — botanical close-up

Reported Benefits (Provisional)

Acts as a selective antioxidant, neutralizing harmful free radicals, which helps protect cells from oxidative stress. This can reduce the risk of chronic diseases. - May reduce inflammation by modulating cytokine production, potentially lowering the risk of inflammatory conditions. - Enhances mitochondrial function, improving cellular energy production and overall vitality. - Supports cognitive health by reducing oxidative stress in the brain, which may enhance memory and focus. - Promotes cardiovascular health by improving endothelial function, which can lead to better blood flow and reduced blood pressure. - May improve metabolic health by enhancing insulin sensitivity, potentially aiding in weight management. - Supports athletic performance by reducing exercise-induced oxidative stress, leading to quicker recovery times.

Origin & History

Natural habitat

Molecular hydrogen (H2) is a colorless, odorless gas that is the simplest and most abundant molecule in the universe. It is typically produced through the electrolysis of water or by reacting acids with metals. In supplements, it is often dissolved in water or inhaled as a gas.

“Hydrogen therapy has gained attention in recent decades for its potential health benefits, although its therapeutic use is relatively new. It has been used in Japan as a health supplement since the early 2000s.”Traditional Medicine

Research Narrative (Provisional)

Research includes several randomized controlled trials (RCTs) and animal studies showing potential benefits in reducing oxidative stress and inflammation. However, more large-scale human trials are needed.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

- Contains no calories or nutrients. - Pure molecular hydrogen is a gas at room temperature. - Dissolves in water to form hydrogen-rich water.

Reported Mechanism (Provisional)

Mechanism of Action

Molecular hydrogen selectively scavenges cytotoxic hydroxyl radicals (•OH) and peroxynitrite (ONOO-) without affecting beneficial hydrogen peroxide or nitric oxide. It activates the Nrf2-Keap1 pathway, upregulating antioxidant enzymes like catalase and superoxide dismutase. H2 also modulates inflammatory cytokines including TNF-α, IL-6, and NF-κB signaling pathways.

Clinical Narrative (Provisional)

Over 170 human studies have investigated molecular hydrogen's effects across various conditions. Clinical trials with 20-100 participants show H2 water consumption (1-2 liters daily) can reduce inflammatory markers by 10-30% and improve antioxidant status. Studies demonstrate benefits for metabolic syndrome, exercise recovery, and cognitive function, though most trials are small-scale and short-term. The evidence is promising but requires larger, longer-duration studies for definitive therapeutic claims.

Also Known As

H2DihydrogenHydrogen gasMolecular hydrogen gasH2 therapyHydrogen-rich waterTherapeutic hydrogen

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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