Your body uses them as you do physical activity, which makes replacing them important.” A fast and convenient way to do that ...

A fast and convenient way to do that is mixing electrolyte powder into your water, says Amy Goldsmith, a registered dietitian specializing in sports nutrition who owns Kindred Nutrition & Kinetics.

While regular old tap water contains trace amounts of electrolytes, hydration supplements, like electrolyte powders ... but past research on sports drinks may be used to understand their efficacy.