What is magnesium 4?

Over 300 functions. Magnesium is a essential for the function of over 300 enzymes & needed for muscle, nerve & heart function.Low magnesium can cause or aggravate muscle spasms, anxiety, insomnia, migraine headaches, hypertension, fatigue, palpitations, constipation, asthma, osteoporosis etc. The best magnesium supplements are magnesium taurate, glycinate, citrate & aspartate. See http://drcarolyndean.Com/magnesium_miracle.