I wanted to know if there are any scientifically proven benefits to drinking hydrogen water, also known as hydrogenated water.

Here are the scientific peer reviewed studies I read;

Therapeutic Efficacy of Molecular Hydrogen: A New Mechanistic Insight
https://www.ncbi.nlm.nih.gov/pmc/arti...

Hydrogen-rich water for improvements of mood, anxiety, and autonomic nerve function in daily life
https://www.ncbi.nlm.nih.gov/pmc/arti...