Vitamin and mineral deficiencies can cause restless leg syndrome. A lack of iron, vitamin D, folic acid, magnesium, or vitamin B are the most common culprits. A doctor can run tests to determine whether a patient has a deficiency, especially in the case of vitamin D deficiency. If he or she does, the doctor will recommend the best supplements or dietary changes for correcting the issue. Do not begin taking supplements for a deficiency without consulting a physician first, as they can affect medication and other factors.

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