Hydrogen Water Effects: How H₂ Works in the Body

Hydrogen water is perfectly ordinary drinking water to which molecular hydrogen (H₂) has additionally been added. H₂ is the smallest molecule in the universe – colourless, odourless and tasteless. It changes neither the pH value nor the mineral content of the water.

The decisive difference compared with normal tap or mineral water: H₂ water contains dissolved hydrogen at a concentration of typically 0.5–1.6 ppm (parts per million). Normal water contains practically no free hydrogen.

Important: hydrogen water does not replace normal drinking water – it complements it. The AWAKE product line uses nanobubble technology to keep the hydrogen particularly stable in the water.

The key mechanism of H₂ lies in its property as a selective antioxidant. Unlike classic antioxidants such as vitamin C or E, molecular hydrogen specifically neutralises the most harmful free radicals – in particular the hydroxyl radical (•OH) – without affecting useful signalling molecules such as nitric oxide (NO) or hydrogen peroxide (H₂O₂).

Why does this matter? Free radicals are not fundamentally bad – they play an important role in immune defence and cell communication. Classic antioxidants do not distinguish between “good” and “bad” radicals. H₂ does.

The pioneering study by Ohsawa et al. (2007) in the journal Nature Medicine was the first to demonstrate this selective mechanism and triggered a wave of follow-up studies.

Mitochondria – the “power plants of the cells” – produce around 90% of our cellular energy in the form of ATP. This process inevitably generates free radicals as by-products. With increasing age or under chronic stress, mitochondrial efficiency declines.

Because of its extremely small molecular size, molecular hydrogen can penetrate directly into the mitochondria – a property that hardly any other antioxidant possesses. There it can reduce oxidative stress and possibly support energy production.

Studies suggest that H₂ may protect mitochondrial membrane integrity and improve ATP production. This could explain why many users report more energy and less fatigue.

Oxidative stress plays a central role in cardiovascular diseases and metabolic disorders. Several studies have investigated how H₂ might act here:

• Vascular protection: H₂ may reduce oxidative damage to endothelial cells (the inner vessel wall) and thereby support vascular function
• Inflammatory markers: studies show a reduction in pro-inflammatory cytokines such as TNF-α and IL-6 with regular H₂ intake
• Insulin sensitivity: a study in type 2 diabetics showed improved insulin sensitivity and lipid profiles after 8 weeks of consuming H₂ water

Important note: these results come from studies and do not mean that hydrogen water cures or prevents diseases. For health complaints, please always consult a doctor.

Intensive training generates large amounts of free radicals in the muscles. While moderate amounts are necessary for training adaptations, an excess can delay recovery and lead to muscle soreness.

Hydrogen water is being used by more and more athletes because H₂ acts selectively – it neutralises the excess harmful radicals without blocking the positive training stimuli.

Studies show promising results:

• Reduction of lactate build-up during intensive training
• Faster recovery after endurance exertion
• Less subjectively perceived muscle soreness
• Potentially better endurance performance

Hydrogen water can be ideally combined with fitness supplements such as amino acids and magnesium – for muscle recovery and cell protection at the same time.

In addition to the measurable biological effects, many users report improvements in general well-being:

• More energy in everyday life: fewer afternoon slumps and a more constant energy level
• Better sleep quality: possibly through a reduction of oxidative stress and support of melatonin production
• Mental clarity: the brain is particularly susceptible to oxidative stress – H₂ crosses the blood–brain barrier
• Skin appearance: antioxidant protection may have a positive effect on skin ageing

These subjective reports partly match the state of research, but vary from person to person. H₂ water is no substitute for a healthy lifestyle with sufficient sleep, exercise and a balanced diet.

As of 2025 there are more than 2,000 scientific publications on molecular hydrogen, including numerous human studies. Research focuses on the following areas:

• Oxidative stress and antioxidant capacity
• Inflammatory processes and immune modulation
• Athletic performance and recovery
• Metabolic health (blood sugar, lipids)
• Neuroprotective effects

The results are promising, but research is still at a comparatively early stage. Larger, long-term studies are needed to confirm the findings so far.

Important studies:

• Ohsawa et al., 2007 – Nature Medicine: H₂ as a selective antioxidant
• Kajiyama et al., 2008: H₂ water and insulin sensitivity in type 2 diabetes
• Aoki et al., 2012: H₂ water and lactate in athletes
• Li et al., 2024: Systematic review & meta-analysis on H₂ and physical performance

For a detailed overview of the research and further references, visit our comprehensive hydrogen water guide.