Lately, I've been getting alot of toe, foot and leg cramps from grappling so much. I had a talk with a friend of mine who is a professional bodybuilder. He told me that cramps occur due to a communication problem with your nervous system and your muscles when your electrolites are depleted. He recommended that i take magnesium pills and that it would almost instantly go away. I went to the pharmacy on the way home and picked up some magnesium pills, took one and low and behold in about 10 minutes, all my muscles relaxed and the cramps went away like magic. I'm a firm believer now and will continue to take it daily. Just thought i'd share this with people who have the same problem. try it, it works!