Making the Magnesium-Migraine Link
 ..."It's very likely that magnesium deficiency is a widespread cause of  migraines, maintains Dr. Mansmann. Studies show that many people don't even come  close to getting the Daily Value of magnesium, which is 400 milligrams. "On a  daily basis, 30 to 40 percent of American people take less than 75 percent of  the Daily Value of magnesium," says Dr. Mansmann... 
  ....What's more, several different things, from the caffeine in just two cups  of coffee a day to the chemicals in most asthma medications, remove some  magnesium from your system. "We know that intake is low for a lot of people. We  know that a lot of medications, such as diuretics (water pills) and a variety of  cardiovascular medications, can increase magnesium losses. We know that people  with diabetes who have high blood sugar lose a lot more magnesium in the urine  and, as a result, run the risk of magnesium deficiency," says Karen Kubena,  Ph.D., associate professor of nutrition at Texas A & M University in College  Station. Even stress, a frequent cause of migraines, can remove magnesium from  your system, says Dr. Mansmann....
 Full article and a great website: www.newmediaexplorer.org/chris/2005/09/28/making_the_magnesiummigraine_link.htm