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Many fruits and vegetables contain three important electrolytes -- calcium, potassium and magnesium. High-calcium fruits and vegetables include collard greens, spinach and turnip greens. Fruits and vegetables that are high in potassium include apricots, bananas, potatoes, kiwi, tomatoes and sweet potatoes.
While water is the primary substance, sweat also contains electrolytes, such as sodium, chloride, potassium, and magnesium, small amounts of urea and lactate, as well as trace elements like copper, zinc and iron. The loss of excessive amounts of electrolytes and water can quickly dehydrate you.lectrolytes lost from sweat are replaced through food, and plain water is what your body prefers for adequate rehydration. 1  Eat foods high in electrolytes. 2  Do not restrict salt in the diet. 3  Drink enough water.