“In combination, however, carnitine and insulin sharply suppressed pyruvate oxidation (75%) and doubled the rate of palmitate oxidation.”
“They also suggest that plasma carnitine in vivo may interact with insulin both additively and permissively on the metabolism of carbohydrates and fatty acids”
“When carnitine and insulin were administered together, their effects on the oxidation of glucose and palmitate, but not on glycolysis, were additive.”