Competitive athletes can lose excessive amounts of salt, but it is highly individualized. Knowing exactly what you lose is the key to successful replenishment and optimal performance. The LEVELEN ERS™ is designed to address your specific needs, so high salt intake should not be an issue. The goal is to replenish what you lose, rather than take on unnecessary sodium and other electrolytes. Without determining your specific electrolyte needs through a LEVELEN ERSTM Sweat Test, electrolyte replenishment remains a trial-and-error guessing game.