Sodium, potassium, and calcium are electrolytes that are essential minerals that play vital key roles in cellular function. They regulate fluid retention to keep you hydrated, balance your pH levels (the measure of acidity and alkalinity), control nervous system function and muscle contraction. Electrolytes keep the balance on your bodily fluids and ensure proper cell functions reducing fatigue, headache, nausea, blood pressure changes, muscle cramps, and low energy.