nterrelationships among Carbohydrates, Proteins and Fat in Human Metabolism ProteinFat Carbohydrate Amino AcidsGlycogenTriglycerides Glucose Pyruvate Acetyl CoA Krebs Cycle (TCA) and Electron Transport System Lactic acid Fatty Acids Glycerol CO 2, H 2 O, ATP Protein Fat Carbo Protein Carbo Fat Fat Protein Pr, Carbo, Fat Energy