Hydrogen water vs hydrogen tablets (form / exposure): What It Is, Uses, Evidence & Safety

At a glance

Purpose, evidence and practical considerations.

How it works & important distinctions

Regulatory status: OTC dietary supplement / functional beverage (US, DSHEA); food or food supplement (EU, Japan). Not a prescription drug. Not WADA-prohibited. The form is the delivery vessel and the generation method, not a new molecule

Different forms

The evidence on this page does not automatically apply to:

Inhaled H₂ gas (2–4% v/v)
H₂-rich saline IV
lactulose (colonic bacterial H₂)
“alkaline water” sold without a measured H₂ number