Molecular hydrogen. Can it improve deep sleep?

After Nature Medicine published the now well-known study by a group of Japanese scientists [1] describing hydrogen’s selective antioxidation capacity, hydrogen was widely featured in Japanese media who reported potential health benefits of molecular hydrogen for humans. At the same time, many companies including Itoen, a major beverage company in Japan, started marketing their hydrogen products. Already in 2008 Japan had a wide variety of hydrogen water products to choose from. Following a study in 2012 [2] demonstrating decreased complications and improved survival rate from a cardiac arrest among rats, in 2016 hydrogen gas inhalation was approved as a medical intervention for patients who suffered from brain oxygen depletion following a cardiac arrest.