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Research profile: Echo Ultimate

By Hydrogen Studies Editorial Team · Updated · Reviewed by Sarah Taylor-Laine, M.Sc., Research Director, Echo Water

Disclosure: Echo Water makes this product and funds Hydrogen Studies. The studies below were run by other researchers; we list them by a fixed rule so the count can be checked.

Of 136 human studies of drinking hydrogen water, 37 report the concentration they used, and 16 of those used 1.46 ppm or less, a level the Echo Ultimate reaches. Of those 16, 10 improved their main outcome, 1 found no clear effect, 4 had mixed results and 1 did not report a direction. 99 studies did not report a concentration and are not counted.

None of these studies tested an Echo product. They studied hydrogen water at concentrations this device can reach. None of them was funded by Echo. 13 of 16 state their funding.

Concentration measured by H2 Analytics (Las Vegas), report H2A-240603-4 (June 3, 2024): 1.46 mg/L.

How this count is made

Human studies in the Hydrogen Studies database in which people drank hydrogen water, and the paper reports a hydrogen concentration at or below 1.46 mg/L (the concentration H2 Analytics measured for the Echo Ultimate). Animal and cell studies, inhaled gas, saline and bathing studies are excluded. Studies that do not report a concentration are counted separately, never matched. A study's result is the direction of its primary outcome as recorded from the abstract and reviewed by our reviewer.

The matched studies (16)

StudyYearDesignPeopleDaysH2 (mg/L)Main resultSource
Hydrogen Water Improves Body Hydration in Clinical Study2026Uncontrolled trial (single-arm or pilot) · Human study10211.2ImprovedPubMed
Hydrogen Water Boosts Swimming Performance in Elite Athletes2026Randomized controlled trial · Human study1240.9MixedPubMed
Hydrogen Water Mouthwash Reduced Tooth Decay-Causing Bacteria2025241.3ImprovedPubMed
Hydrogen Water Reduces Oxidative Stress in Healthy Adults2022Observational study · Human study5341801.3ImprovedPubMed
How Water Type and Storage Affect Hydrogen Water Quality and Benefits2020Uncontrolled trial (single-arm or pilot) · Human study0.96Not reportedPubMed
Hydrogen Water Reduces Inflammation and Cell Death in Healthy Adults2020Randomized controlled trial · Human study38280.753MixedPubMed
Hydrogen Water Reduces Oxidative Stress and Body Fat in Healthy Adults2020Randomized controlled trial · Human study61560.5868ImprovedPubMed
Hydrogen Water Improves Sleep and Digestive Health in Healthy Adults2019Randomized controlled trial · Human study60280.2No clear effectPubMed
Hydrogen Water Shows Promise for Memory Loss in At-Risk Individuals2018733651.2096MixedPubMed
Hydrogen Water Protects Newborn Brains from Birth Injury2016Controlled trial (non-randomized) · Human study60101.2096ImprovedPubMed
Hydrogen Water Helps Patient with Severe Transplant Complication2016Case report or series · Human study11.2096ImprovedPubMed
Hydrogen Water Speeds Pressure Ulcer Healing in Elderly Patients2013Uncontrolled trial (single-arm or pilot) · Human study221.3ImprovedPubMed
Hydrogen Water Improves Quality of Life During Cancer Radiation Treatment2011Randomized controlled trial · Human study49421.31ImprovedPubMed
Hydrogen Water Shows Promise for Muscle Disease Treatment201148840.5MixedPubMed
Hydrogen Water Improves Cholesterol and Reduces Oxidative Stress2010Uncontrolled trial (single-arm or pilot) · Human study20561.3104ImprovedPubMed
Hydrogen Water Shows Rapid But Short-Lived Absorption in Breath Tests2009Uncontrolled trial (single-arm or pilot) · Human study511.169ImprovedPubMed

This is a summary of published research, not medical advice. Hydrogen water is not a treatment for any disease. How we review studies · How to compare hydrogen devices

Data version 391389b98a-H2A-240603-4, generated November 10, 2026.