Dean Ornish Says Omega-3 Fats Could Kill You!! - Yes, you read that right. Recent studies by Dr. Alexander Leaf of Harvard Medical School and others confirm many benefits to Omega-3 fatty acids for most people. However, for a sub-population who have had a heart attack or have congestive heart failure, consuming Omega-3 fats could kill them.
When heart muscle cells are starved for oxygen (as during heart attack or congestive heart failure), those heart cells become "hyper-excitable." Hyper-excitable cells activate or contract with less stimulus than healthy cells. This increased sensitivity is probably what keeps the weakened cells constricting at all. However, omega-3 fatty acids are "effectively removing these hyper-excitable cells from functioning." And if a significant proportion of the cells pumping your heart are hyper-excitable cells, omega-3 fatty acids could seriously reduce your heart's ability to pump, and in some cases that can cause a lethal heart attack.