The American Heart Association recommends Margerine over Butter. http://www.healthcastle.com/butter-or-margarine.shtml This is either because they know that HEART CANCER is RARE or because they are wrong again.
I had an opportunity to speak with a PhD in Bio-Chemical Engineering in 97. I specifically asked if Margerine was "BAD for YOU" his answer was long. It was also very detailed. BUT the bottom line was the when you make a liquid oil solid by hydrogenating it, it takes on chemical characteristics that the human body is not familiar with. So this means that we dont have the enzymes to digest or process margarine. As far as research, he specifically told me that the Margarine molecule simply gets stuck in the body and cannot be broken down. Me personally, proven or NOT, i dont eat stuff that i cant digest.