Inhalation of a combination of hydrogen and oxygen
Hydrogen has therapeutic and preventive effects, the effects of increased oxygen supply are well known and are not specifically mentioned here. The ratio of H2 to O2 is usually 2/3 H2 and 1/3 O2. Hydrogen has become a popular medical agent due to the gas's therapeutic and preventive effect on a number of diseases. Studies have shown that hydrogen reduces reactive oxygen species (ROS) in tissues and has other antioxidant and anti-inflammatory effects in the case of injuries after oxygen deprivation. Clinical investigations have also shown the beneficial effects of inhaled hydrogen gas on acute myocardial infarction and cardiac arrest.

Hydrogen inhalation is a therapeutic method that involves inhaling hydrogen (H2) gas to improve health. Research shows that hydrogen can have antioxidant properties and anti-inflammatory effects that can help protect against a number of diseases and disorders. Hydrogen inhalation can have several positive effects on health, including: 

Reduced inflammation: Hydrogen can reduce inflammation in the body, which is linked to many chronic diseases and disorders.

Reduced oxidative stress: Hydrogen can act as an antioxidant and help reduce oxidative stress, which is a condition where harmful free radicals can cause damage to the body's cells.

Protection against neurological disorders: Hydrogen can help protect the brain against neurological disorders such as Alzheimer's disease and Parkinson's disease.

Better sporting performance: Hydrogen can improve sporting performance and reduce fatigue and muscle damage.

Better digestion: Hydrogen can help improve digestion and relieve symptoms of irritable bowel syndrome and other digestive problems.

Examples of medical research articles:

H2 and cancer
Cardiovascular and metabolic diseases
Brain cancer and skin cancer
Asthma
Acute and chronic diseases
Infections
Stroke and TBI
Anti-aging