SaltStick Fastchewshave been formulated to provide electrolytes to help minimize heat stress and muscle cramping due to perspiration, in a quantity and form which your body can absorb. This product is ideal for athletes, outdoor workers or for use in hot conditions. Two SaltStick Fastchews in an hour equate to 100 mg sodium, 30 mg potassium, 10 mg magnesium, and 6 mg calcium per hour, which is the ideal ratio to keep you moving.