To my understanding, water has no nutritional value. It has nothing in it. It’s simply just water.
That said, why is it so crucial to life?
In: 55
We’re mostly water. Animal cell membranes are pretty squishy, and being filled with water keeps those cells in the shape they need to function. Water is also critical for controlling the concentration of things like electrolytes in our blood stream, and is part of a lot of different chemical reactions, like processing sugar.
It’s everywhere and it’s easy to use, so life evolved to make use of it.
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