Over 1,700 peer-reviewed papers and 81 clinical trials have studied molecular hydrogen — and the same questions keep coming up. This mega-post answers 14 of the most common hydrogen water questions honestly, with citations, no hype, and no medical claims. From what hydrogen water actually is, to how much to drink, to how you know if your machine is working.

Not all water ionizers are created equally. If you've been comparing Kangen machines, the spec gaps are worth knowing before you spend $4,700. This guide breaks down 5 alternatives with stronger H₂ output, better warranty terms, or more transparent pricing than the Kangen SD501.