When cardiac surgeon Dr. Dwight Lundell “confessed” that he had got heart disease wrong throughout his career, people sat up and noticed. Hundreds of thousands of people shared his essay, called “Heart Surgeon Declares On [sic] What Really Causes Heart Illness,” on Facebook. In it, he explained why he had changed his mind about the advice that he’d given in his career.
The standard advice for heart health, as given by the American Heart Association, is to keep saturated fat low and avoid sugar. In particular, it says that you should avoid the kind of fat called “trans fat.” This all means picking fat-free or low-fat dairy. And if you enjoy red meat, you need to pick the cuts that have the least fat that you can find.