Product review (5 stars): ISOTONIC-- STOPS AND PREVENTS CRAMPS
Developed by Bill Gookin who is an ancient olympic runner and chemist.  Used to be called Gookinade This is isotonic formula that is little-known but replaces all electrolytes used in extreme exercise conditions.  Got leg cramps at night? Just swig a glass of this and you recover in a minute or two.  I do not sell this or work for Vitalyte.  I have used it for 30 years.  I tell folks about it and they do not really believe me.  My wife didn't but it ended her horrible sudden, night leg cramps and she is a believer too!