Evidence for brain serotonin-mediated control of carbohydrate consumption in normal weight and obese humans
1993
A plasma insulin and amino acid-mediated mechanism is thought to modulate brain serotonin concentration, thereby regulating carbohydrate consumption on a meal to meal basis. It has been suggested that obesity is associated with a defect in the appetite control system. Furthermore, post-absorptive plasma levels of several amino acids are increased in obese subjects, which is ascribed to obesity-associated insulin resistance and/or hyperinsulinemia. We studied breakfast-induced changes in plasma ratios of tryptophan to other large neutral amino acids and associated differences in macronutrient composition of lunch food in normal weight and obese human subjects
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