Vitalytes electrolyte formula hydrates, replenishes, energizes and revitalizes, all while maintaining that perfect electrolyte balance of the four core electrolytes: sodium, potassium, calcium and magnesium. We pay special attention to the dynamic duo: sodium and potassium since these are the first two minerals lost and play the leading role in hydration. Our sodium/potassium balance is the ideal marriage for hydrating thirsty bodies with exactly what they need and nothing they don't. Not too much sodium, not too little potassium and the optimal amounts of calcium and magnesium. And because Vitalyte is made almost entirely of glucose - the only sugar that doesn't have to be digested - it's isotonic which means that it matches to the body's fluids that are being absorbed directly from the stomach into the blood, similar to an IV.