Cellular hydration can only occur if the water we consume is in single-water-molecule form.
I thought I heard or read that the body can break the structure of water molecules down or restructure them IF it has the necessary tools, such as minerals, to do so. I don't think someone here will actually prove this since nobody has actually observed water molecules clumping together let alone know what the body does with them at the molecular level. I suspect the body might actually lose some of those nutrients if it is using them to change the structure of water. Hence, it could be another reason why we are nutritionally deficient.
If you look at the process I describe in treating the water I consume, you will see this process is superficially similar to what nature does to water found in a river flowing from a mountain.