To add to what the others have said, add magnesium to the mix, as well as water. Dehydration is the main cause of muscle cramps, and weakness. By the cramps being in the toes, it could very well be your shoes. Flip flops can be a culprit, you have to clinch your toes in order to keep them on. High heels may also cause toe cramps, for the same reason, and they put your foot in an unnatural position as well. hope that helps.