In the early 1900's, whole dairy products, meats and white flour were the main foods people ate. More butter and animal fats were added. Heart disease was responsible for only 10% of all deaths at the time. Between 1920 and 1955, the number of deaths due to heart disease soared to 40%. To explain the rapid rise in heart disease, a "lipid hypothesis" was developed. Scientists discovered that cholesterol levels increased with increased dietary fat intake. Heart disease victims were…