SaltStick Fastchews have 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 per hour equate to 100 mg sodium, 30 mg potassium, 10 mg magnesium, and 6 mg calcium, which is the ideal ratio to keep you moving.