Now updated with 30 percent new material, the only comprehensive guide to one of the most essential but often-overlooked minerals, magnesium—which guards against and helps to alleviate heart disease, stroke, osteoporosis, diabetes, depression, arthritis, and asthma Magnesium is an essential nutrient, indispensable to your health and well-being. By adding this mineral to your diet, you are guarding against—and helping to alleviate—such threats as heart disease, stroke, osteoporosis, diabetes, dep