Thompsons organic magnesium may help to relieve muscle cramps, nervous tension and pre-menstrual symptoms. Magnesium is required for hundreds of of chemical reactions in the body through its ability to activate enzymes. Magnesium is perhaps the most important mineral, if not the most important nutrient involved in the energy production process of the body. Extensive food processing and poor soil now make it very challenging to get adequate amounts of magnesium. Muscles contain approximately a quarter of all the magneium found in the body and muscle cramps, spasms are both common symptoms of magnesium insufficiency. Magnesium insufficiency can lead to symptoms of mood swings, irritability and depression.