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Which Electrolyte Is Best for Hydration: Science Guide
The best electrolyte for hydration is usually sodium, because it helps your body retain fluid and supports rapid absorption—especially when paired with small amounts of carbohydrate (the principle behind oral rehydration solutions). However, “best” depends on your situation: potassium supports cellular fluid balance, magnesium may help with cramps and sleep, and balanced blends work best for workouts, heat, and migraine-prone people.
