".... into the 1990s as Dr. Krauss began to test whether changes in diet could change a person's LDL profile from good to bad, or from pattern A to pattern B. Using data from the Framingham Heart Study -- the longest-running study of its kind -- health organizations had begun to roll out the message of "good" and "bad" cholesterol, a message that in turn created the concept of good fats and bad fats. But during experiments, Dr. Krauss discovered that while a diet high in saturated fat from dairy products would indeed make your LDL levels rise, "saturated fat intake results in an increase of larger LDL rather than smaller LDL particles," as he wrote in an American Journal of Clinical Nutrition review he co authored in 2006. A diet heavy in full-fat cheese and butter -- but not overloaded in calories -- triggered the relatively harmless health profile described as pattern A. (Having demonstrated the benign consequences for cholesterol from consuming dairy fat, he is currently conducting studies to find out if the same holds true for diets high in saturated fat from beef.)
Not only is dairy fat unlikely to increase heart-disease risk, Dr. Krauss and others have learned, but reducingsaturated fat in a way that increases carbohydrates in a diet can shift a person's LDL profile from safe to dangerous. That's pretty much what happens whenever some well-meaning person with "high LDL" starts eating "low-fat" frozen dinners filled out with corn-derived additives, all the while engaging in the customary ravaging of a basket filled with dinner rolls."
http://www.menshealth.com/men/health/heart-disease/understanding-cholesterol-and-heart-disease/article/34cf5983f7a75210vgnvcm10000030281eac/6?print=true&url=http%3A%2F%2Fwww.menshealth.com%2Fmen%2Fhealth%2Fheart-disease%2Funderstanding-cholesterol-and-heart-disease%2Farticle%2F34cf5983f7a75210vgnvcm10000030281eac%2F6
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