You will see three numbers quoted about ionised water: pH, dissolved hydrogen and ORP. The first two are easy to picture. ORP is the one that trips people up — so let us make it simple.
What ORP actually measures
ORP — oxidation-reduction potential, measured in millivolts — describes whether water tends to give electrons away (a negative, ‘reducing’ value) or take them (a positive, ‘oxidising’ value). Ordinary tap water usually sits on the positive side. Freshly ionised Kangen water reads negative.
Why fresh matters
Two things fade the moment water meets the air: the dissolved molecular hydrogen and the negative ORP. Pour a glass, leave it on the counter, and within a couple of hours the numbers drift back toward ordinary. This is not a flaw — it is physics. Hydrogen is the smallest molecule there is, and it simply escapes.
This is the whole reason a Kangen machine makes water at your tap, on demand — so what you drink is as fresh as it gets, not bottled weeks ago.
How to keep it fresh
- Pour and drink within the hour for the freshest glass.
- Fill a bottle to the very top — less air means slower loss.
- Keep it capped and cool.
One honest note: ORP is a real, measurable property of the water, and we describe it as exactly that — a physical characteristic, not a health claim. What it means for the body is still a research question, and we cover that honestly in our research notes.
