Hydrogen Concentration and Storage

Hydrogen concentration in water is typically measured in parts per million (ppm) or parts per billion (ppb). One ppm equals 1000 ppb. Under normal conditions, water can dissolve a maximum of about 1.6 ppm of hydrogen[1]. Portable hydrogen bottles generally produce water in the range of 1000–2000 ppb—close to saturation. Hydrogen gas is volatile and escapes quickly; even high‑quality containers cannot prevent gradual loss[2].

According to Hydrate+, for best results hydrogen water should be consumed within two hours of generation[3]. In an open glass, the hydrogen concentration can last up to two hours, whereas a bottle that is opened occasionally may retain hydrogen for 3–5 hours, with the highest concentration in the first two hours[3]. In a sealed container, hydrogen loss is slower—about 0.1 ppm per day—and water can remain hydrogen‑rich for up to two weeks, depending on the initial concentration[3]. If you need to store hydrogen water temporarily, use airtight metal bottles rather than plastic or glass. Avoid shaking or warming the water, since heat and agitation accelerate gas escape. Hydrogen concentration has not been standardized across products[4], so consumers should compare dissolved hydrogen levels when evaluating different devices.

References

1. The maximum solubility of hydrogen is about 1.6 ppm (1600 ppb)[1].
2. Hydrogen gas escapes quickly; drinking soon after generation maximizes intake[2].
3. Hydrate+ advises consuming hydrogen water within two hours of generation[3].
4. There is no industry‑wide standard for hydrogen concentration[4].

[1] Electrolyzed–Reduced Water: Review I. Molecular Hydrogen Is the Exclusive Agent Responsible for the Therapeutic Effects - PMC

https://pmc.ncbi.nlm.nih.gov/articles/PMC9738607/

[2] [4] Hydrogen Water: Miracle Drink or Overhyped Myth?

https://www.healthline.com/nutrition/hydrogen-water

[3] Hydrogen Water Bottle

https://hydrateplus.io/products/hydrogen-water-bottle