Friday, November 18, 2011

Too Much Vitamin D Can Cause Heart Problems

New research shows that higher than normal levels of vitamin D can make your heart beat too fast and out of rhythm, a condition called atrial fibrillation, according to a report presented at the annual meeting of the American Heart Association.

The study, which followed 132,000 patients at a Utah based medical center, found that the risk of newly developed atrial fibrillation jumped almost three-fold when blood levels of vitamin D were high. 
High levels of vitamin D only occur when people take supplements,  said the study’s lead author, Dr. Jared Bunch, director of electrophysiology research at the Intermountain Medical Center in Murray, Utah.Bunch said. Because consumers assume supplements sold over the counter are safe, they may not realize the danger of taking too much vitamin D, he added.The recommended daily intake of vitamin D for people from 1 year to age 70 is 600 IUs, or international units a day, based on what is sufficient for bone health, according to the National Institutes of Health. There are few natural food sources of vitamin D, although oily fish such as tuna or salmon are among the best. For example, 3 ounces of cooked salmon contains 447 IUs of vitamin D per serving. Small amounts are also found in cheese and egg yolks. The Department of Agriculture provides a comprehensive list of foods containing vitamin D.

Source: msnbc

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