These nutrients will help you maintain proper fluid balance to reduce muscle cramps, optimize energy levels, and protect your immune system so you can function at your best. So play harder, endure longer and feel replenished with Electrolyte Stamina Power Pak.* Antioxidants – Vitamin C, Selenium, Zinc, and Manganese are powerful antioxidants that support and protect your immune system and help seek out and destroy roaming free radicals.* B Vitamins – Help maintain energy and support metabolism.* Electrolytes – Potassium, Sodium, Calcium, and Magnesium are essential electrolytes that help your body maintain hydration, prevent muscle cramps, and maintain energy and stamina.* It also includes an electrolyte concentrate of full spectrum trace minerals from seawater.