The Minnesota Coronary Study was conducted from 1968-73. It was designed by researchers who fervently believed that saturated animal were killer fats and polyunsaturated vegetable oils, shortenings and margarines were a much healthier alternative. It was one of the largest and well conducted diet trials ever conducted. Mental patients were randomized into groups. The results did not please the researchers. The animal fat group were found healthier and lived longer than the vegetable oil group. Instead of promptly publishing their data, the aghast researchers delayed publishing the results for years and in a small journal few doctors read. Even then, they only published a portion of their results. The entire set of original data was rediscovered (in an attic) and published in full last week in the BMJ. Although vegetable oils lower cholesterol, they do not cut heart attacks. Meat and dairy have not been shown to cause heart disease.