Body composition
Intracellular water
The water held inside your cells, which is most of your body water.
Unit L
What it is
The water held inside your cells, which is most of your body water.
Why it matters
Muscle cells hold most of it, so it rises and falls with muscle mass and gives an independent read on whether lean tissue is being kept.
Reading the number
Read it as a share of total body water rather than alone. A fall here while extracellular water holds steady is the pattern that suggests losing cell mass.
What moves it
hydrationrecent exercisemuscle masslast mealthe device used
When to raise it
Worth mentioning a steady fall alongside a loss of muscle.
Also known as
On a report in another language.
A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under Intracellular water.
ICWÁgua IntracelularRakusisene vesiIntrazelluläres WasserAgua intracelularEau intracellulaire
Catalog entry last updated 2026-08-29. Browse all 165 metrics.