Combines sodium, chloride, potassium, calcium and magnesium to replenish electrolytes lost during exercise; supports muscle function, retains hydration, may lessen the perception of exertion* Provides glucose and maltodextrin, important pre-exercise sources of rapidly available energy; spares glycogen stores and delays fatigue* Contains the energizing cofactors malic acid and alpha ketoglutarate, both Krebs cycle intermediates* Includes vitamin C to protect muscles from free radicals generated during exercise and to enhance tissue recovery* Promotes mental focus under stressful conditions and may also help promote physical endurance with the amino acid l-tyrosine, a neurotransmitter precursor* Especially for strenuous or prolonged exercise at least 1–2 hours in length
