My dad suffered for years from horrible leg cramps at night. He was waiting at an appointment one day and started talking to the man next to him. Some how they hit the subject of muscle cramps. He told my dad to keep a shaker of salt on his night table. When he was struck with a cramp, to pour a few grains in his hand and lick it. He tried it and it works. You get an immediate release of the cramp. I have used this through the years and it has never failed me, not once.