Now, medical opinion has shifted, and doctors are more concerned about saturated fat as a risk factor in heart disease. The USDA Dietary Guidelines, designed to promote good health, recommend that of the total calories we consume, no more than 30 percent should come from fat. Of this 30 percent, less than 10 percent should be from saturated fat. The remaining fat calories should come from mono- and polyunsaturated fats. These health guidelines target eggs as a good food for obtaining protein without a lot of undesirable fats.