Lipid Metabolism: Lipid metabolism includes the digestion, absorption, storage, and breakdown of fats, with fatty acids used for energy production, membrane synthesis, or stored as triglycerides.
Ketone Oxidation: Ketone bodies like acetoacetate and beta-hydroxybutyrate are oxidized in peripheral tissues to produce ATP, especially during prolonged fasting or carbohydrate deficiency.
Urea Cycle: The urea cycle occurs in the liver and converts toxic ammonia, a byproduct of protein metabolism, into urea, which is then safely excreted in the urine by the kidneys.