<qa>  What is the average US diet?A washout period represents an average US diet 48 E of carbohydrate, 15 E of protein and 37 E of fat, kcal 16 E of SFA, 14 E of MUFA, and 7 E of PUFA is used to establish a level of normalization of the fatty acid intake among the subjects and to standardize the subjects physiologic state before each experimental diet. 