Electrolytes are salts and minerals, such as sodium, potassium, chloride and magnesium, which are found in the blood. If you've got too much or too little of any one electrolyte, you could experience dehydration, over-hydration, or other imbalances. It is important to maintain and replenish electrolytes quickly these can be quickly replenished in many forms such as drink mix, tablets, capsules, chews and so on