Hydrogen water is water with dissolved hydrogen gas (H2) similar to carbonated water in which the dissolved gas is carbon dioxide. It is tasteless since H2 is an odorless gas. There is limited scientific evidence that hydrogen water has any health benefits in humans, although its proponents make claims it provides such benefits as functioning as an antioxidant, reducing inflammation, reducing risk of metabolic syndrome, providing neuroprotection for various diseases, and reducing side effects associated with cancer radiation treatment.
Hydrogen water is made by dissolving gaseous molecular hydrogen into water under pressure, typically 7.0 mg per liter of water. Alternative means of hydrogen administration are by inhalation of a gas containing up to 4.6% hydrogen, by intravenous injection with a hydrogen-containing saline solution, or by topical application (to the skin).
So far, there is a lack of scientific consensus concerning the evidence that hydrogen has health benefits in humans. A few articles have been published on the topic, but the clinical literature is sparse and what has been published covers many conditions, but not multiple trials of any one condition. Hydrogen water proponents claim that it has health benefits such being an antioxidant, reducing inflammation, reducing risk of metabolic syndrome, providing neuroprotection for various diseases, and reducing side effects associated with cancer radiation treatment. But none of the published articles concerning these claims are systematic reviews or meta-analyses and very little work has been done in animals.
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