Electrolytes are key to hydration, mainly because they enhance fluid retention. “Having more electrolytes can trigger more efficient fluid uptake from the gut,” says Kim Barrett, a gastrointestinal ...

Magnesium, potassium, or sodium? Learn what each electrolyte does, signs of low levels, and when a supplement may help.

Have you ever finished a run and noticed a thin layer of salt built up on your arms or forehead? This is evidence of your body losing salt – or electrolytes – through sweat. Keeping on top of your ...

Optimal ranges are set at different levels for each electrolyte, and levels can be measured with a blood test. If you have an electrolyte imbalance, you either have too much or too little of one or ...