Dr. Cohen's book does the public a great service in discussing the importance of magnesium for maintaining a healthy level of blood pressure. However, as Dr. Carolyn Dean discusses in her very important book The Miracle of Magnesium, magnesium deficiency is a significant factor -- often the major factor -- in many other severe illnesses including heart attacks and other forms of heart disease, asthma, anxiety and panic attacks, depression, fatigue, diabetes, migraines and other headaches, osteoporosis, insomnia, and most cases of muscular problems. Unfortunately, the majority of Americans are deficient in magnesium to some degree and many are severely deficient. Because magnesium deficiency is largely overlooked by orthodox medical doctors, millions of Americans suffer needlessly from the foregoing ailments or are having their symptoms treated with expensive drugs (which often have unpleasant or dangerous side effects) when they could be cured with magnesium supplementation. While I recommend Dr. Cohen's book, I recommend even more highly Dr. Dean's more comprehensive (but easy to read) book The Miracle of Magnesium. Getting the right level of magnesium can not only mitigate a large number of seemingly-unrelated ailments, it may save your life.