I found an article on MDPI a Switzerland-based publisher of open-access scientific journals on the history of Hydrogen in Medicine going back to 1793. If you are interested please enjoy the article. I have also posted an abstract below. You can download the entire PDF article by clicking here:

The On-Off History of Hydrogen in medicine

“Over 2000 publications including more than 100 human studies seem to indicate that humans have only recently benefited from or known about the medical effects of H2 within the past 15 years. However, we have unknowingly benefited from H2 since the dawn of time, from H2-producing bacteria to the use of naturally occurring hydrogen-rich waters.

Moreover, the first writings on the therapeutic effects of H2 date to around 1793. Since then, papers appeared sporadically in the literature every few decades but never exploded until Ohsawa et al. again demonstrated hydrogen’s therapeutic effects in 2007. This landmark paper appears to have been the spark that ignited the
medical interest in hydrogen.

Although H2 was used in the 1880s to locate intestinal perforations, in the 1940s in deep sea diving, and in the 1960s to measure blood flow, H2 was largely viewed as
biologically inert. This review highlights the history of hydrogen in the genesis/evolution of life and its medicinal and non-medicinal use in humans. Although hydrogen medicine has a long and erratic history, perhaps future history will show that, this time around, these 15 years of ignited interest
resulted in a self-sustaining explosion of its unique medical effects.”

Click the title below to read the article

The On-Off History of Hydrogen in medicine