During activity such as running, cycling and other sports, and particularly in hot weather, your body loses electrolytes through sweat. Saltstick Fastchews contain key electrolytes sodium, potassium, magnesium and calcium in the ideal ratio to keep you moving. Directions for Use As a general guideline, athletes should consume 2 tablets (1 serving) per 15-30 minutes during any land-based activity (bike/run) for the duration of the activity. In hot conditions, extreme humidity, or for large athletes, a greater number of Fastchews may be needed to maintain safe electrolyte levels. The suggested maximum dose per day for adult is 50 tablets.