Dietary supplements
http://www.level1diet.com/magnesium-benefits.html
Safety Issues -- However, very high levels of magnesium can cause diarrhea and general gastrointestinal distress, as well as interfere with calcium absorption and bone metabolism. Extremely high levels of magnesium (much higher than the recommended dosages above) may interfere with normal heart functioning and should be avoided. Since research reports no advantages to higher doses of magnesium than the 600mg daily dose, you should not take more than this, unless specifically instructed by a health care professional. As always, we suggest you inform your doctor or health professional before adding any supplement to your diet. You may want to print this page to take to your medical professional, in case they are not familiar with current research on magnesium.
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How Much Magnesium Should You Take per Day? Our review of the research supports suggested supplementation of magnesium, totaling about 400mg in divided doses, 200mg morning and 200mg evening. This supplementary dose should be taken in addition to eating high magnesium foods, such as more vegetables, whole grains, legumes, and nuts. Bigger people, people who perform stressful exercise more than average, or people who are supplementing calcium for bone loss, or diabetics and other people with high levels of inflammation, should consider a larger 600mg daily dose - 300mg in the morning and 300mg in the evening.
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