Muscle Cramp/Tension Formula offers important electrolytes to help maintain proper muscle function as well as soothing herbs to promote overall calmness. The electrolytes magnesium, calcium and potassium are important for maintaining healthy muscle contractile function. In several trials, magnesium supported leg muscle function by helping to lessen occasional nighttime cramping, which can otherwise lead to impaired sleep. The traditionally soothing botanicals lemon balm, passion flower and chamomile are also included for their use in Herbal Medicine as mild sedatives and calmatives.