Glucose metabolism is slowed and fatty acid oxidation is increased, leading to depletion of Gly-FFA cycle-derived coupling factors. Arrow thickness indicates rate of metabolism. Abbreviations: FFA, free fatty acid; Gly/FFA, glycerolipid-free fatty acid cycle; ACC, acetyl-coA carboxylase; FAS, fatty acid synthase; GK, glucokinase; PDH, pyruvate dehydrogenase; PC, pyruvate carboxylase.