Water Retention vs Fat: How to Tell the Difference

The scale cannot tell you which one moved. A few simple observations can.

Speed is the biggest clue

Fluid shifts fast. Two kilos across a weekend is fluid, not fat — the energy maths does not work otherwise. Fat changes slowly and steadily.

Other differences worth noticing

• Fluid leaves a brief dent when you press a thumb into the skin; fat does not.
• Fluid gathers in the ankles, fingers and face; fat distributes more evenly.
• Fluid varies hour to hour and is often worst in the evening.
• Fluid responds to a walk and a glass of water within a day.

None of this is a substitute for a proper assessment, but it is usually enough to stop you panicking at a Monday morning weigh-in.