I think this quote from the New York Times sums it up best
"If you have $100 and want to improve your health, you’re probably better off buying $100 of fresh fruits and vegetables than two cases of hydrogen water,” Dr. Rosner said.
Does Hydrogen Water Live Up to the Hype? (Published 2024)4
It’s been said to improve hydration, reduce inflammation, boost mood and more. We asked some experts if the claims were true.
I agree with others above on the original question posted by the op. Regular exercise (whatever you can do) and good diet are the best answer and supplements are rarely needed unless blood work shows a deficiency.
Getting regular blood work is important especially if anything starts to be out of the recommended levels.
For years I have tried to follow the general recommendations to keep a low salt (sodium) diet - but my annual wellness bloodwork tests started to show my sodium and chloride levels to be below recommended levels. I run and work out regularly and sweat a lot (!) and my doctor who is an ultra marathon runner recommended I take salt tablets after running (she does this as well) and sure enough my sodium and chloride levels have been back to normal for the last couple of years.
Yup I guess I am on a higher sodium diet!