Originally Posted by Abe_Froman

Well powdered gatorade has both salt and potassium. They have an endurance formula that has significantly more of both, and is still pretty cheap.

I'll claim ignorance on magnesium. I'm not sure what, if any, short term detrimental effects there might be from low magnesium in the system, and how quickly you use it. I am fairly certain that it's level of importance is below that of both sodium and potassium. Sodium is the biggie.