"Subcutaneous water" refers to the water that is found just below the skin's surface.
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If it were
subcutaneous water, it would be located between your muscles and your skin, which means you should lose it.
Intracellular water retention (inside the muscle) is good for the body, it's
the subcutaneous water retention (under the skin) that we want to get rid of.
Those deep, etched striations come down to shedding both subcutaneous fat and
subcutaneous water.
The subcutaneous water retention can happen faster and is more a function of electrolyte balance.