Hydrogen Water and Sleep Quality: What the Studies Show

Hydrogen Studies is funded by Echo Technologies LLC, which sells hydrogen water products. Echo doesn't decide which studies we cover or how we describe them — see our editorial policy.

Evidence at a glance: Very low. A few small human trials have measured sleep, mostly as a side outcome. The best-blinded trial, in healthy adults with poor sleep, found no difference from placebo. The most positive, of inhaled hydrogen in people with insomnia, lasted 7 days and was single-blind.

This page covers sleep quality in adults. Insomnia and sleep apnea are medical conditions: if you often can't fall or stay asleep, snore loudly, or someone has noticed pauses in your breathing at night, see a clinician. For the short answer, see the sleep section of our benefits guide.

What human trials found

Drinking hydrogen water

• In 36 adults with obesity, 8 weeks of hydrogen-rich water (1 liter a day, 15 mg of hydrogen) improved sleep-questionnaire scores, but so did placebo. Only one item, self-rated sleep quality, favored hydrogen, at the edge of significance (p = 0.05), with no correction for testing many outcomes [1].
• In 27 adults over 50 starting strength training, 6 weeks of hydrogen water (12 mg of hydrogen, twice a day) showed a non-significant trend toward better sleep [2] (see our exercise recovery hub). In 40 adults aged 70 and older, 6 months of hydrogen water (0.5 liters a day, 15 ppm) didn't change sleep outcomes [3].
• In a 4-week crossover trial of 26 healthy adults (600 mL a day, 0.8–1.2 ppm), sleep scores after hydrogen water didn't differ from placebo, and daytime sleepiness didn't change [4].
• In a single-blind trial of 32 people with long COVID (1 liter a day of 1.6 ppm hydrogen water or plain water for 14 days), an exploratory analysis of the 19 poor sleepers favored hydrogen on one measure but not another (p = 0.06) [5] (see our fatigue hub).

Inhaled hydrogen

• In 66 adults with chronic insomnia, 41 breathed a gas of two-thirds hydrogen and one-third oxygen through a nasal tube, 1 hour twice a day for 7 days; 25 breathed air. On a wrist monitor, the hydrogen group slept longer and lay awake less; sleep efficiency didn't differ. Sleep-quality questionnaire scores were also better than with air. The trial was single-blind, and two of its four authors worked for the inhaler's maker [6].
• After surgery, two hospital trials disagreed. In 75 brain-tumor surgery patients, the hydrogen group slept longer and more efficiently than an oxygen group on some days but not others [7]. In 153 adults aged 65 and older, self-rated sleep didn't differ [8].

Other: hydrogen jelly

• In the only double-blind, placebo-controlled trial we found with sleep as its main outcome, 44 healthy adults with poor sleep ate hydrogen-rich jelly (0.9 mg of hydrogen a day) or identical placebo jelly for 8 weeks. Both groups reported better sleep, with no difference between them. An exploratory analysis found more improvement in people with fewer hydrogen-producing gut bacteria, an idea that still needs testing [9].

What animal studies suggest (not human evidence)

• Mice given hydrogen-rich water for 7 days had more consolidated sleep on brain-wave recordings, and after being kept awake they slept more. One author works for a hydrogen products company [10].

Doses and durations studied

• Drinking: about 0.5 mg to 24 mg of hydrogen a day, usually in 0.5 to 1 liter of water, for 2 weeks to 6 months [1]–[5]. See how much hydrogen water per day.
• Jelly: 0.9 mg a day for 8 weeks [9].
• Inhaling: two-thirds hydrogen, one-third oxygen, 2 hours a day for 7 days [6].
• Timing: No trial compared bedtime with other times. Drinking trials spread servings through the day or served them with meals [1][4]; the insomnia trial's sessions ended 2 hours before bed [6].

What we don't know

• Whether hydrogen helps healthy sleepers. The best-blinded trial found no difference, and in two trials the placebo group improved as well [1][9].
• Objective and longer-term sleep. Only two trials used a sleep-tracking device [6][7], none used an overnight sleep-lab study, and the insomnia trial lasted 7 days [6].
• Independence. Three drinking trials come from one lab in Serbia [1][2][3]; several had company-linked authors or products [1][2][6][9].
• Sleep disorders. We found no human trial of hydrogen for sleep apnea, and none comparing it with proven insomnia treatment such as cognitive behavioral therapy (CBT-I).
• Safety. Few side effects were reported [1][9], but in one surgical trial low blood oxygen during inhalation was more common with hydrogen (7% vs 3%) [8]. See hydrogen water side effects and hydrogen inhalation side effects.

Drafted with AI assistance and checked against each linked source by our editorial team. General information, not medical advice.