These minerals all play roles in muscle contraction and relaxation. Deficiency of any one can lead to muscle cramps. For the full details on using nutrients to deal with leg cramps, see page 353. One study, from Romania, suggests that magnesium supplements can also help bona fide restless legs. So it might be worth your while to make sure you're getting the Daily Value of this mineral, which is 400 milligrams.
Most people fall short of that amount.
The information given here is designed to help you make informed decisions about your health. In larger amounts, vitamins and minerals can have powerful druglike effects on your body. It is possible to overdose on certain vitamins and minerals, and it is possible to experience side effects. Vitamins and minerals can also interact with medications. For all of these reasons, you should always check with your physician when using doses above the Daily Values.