Abstract
Considering that lactate is known to interact with central glucose-sensing networks, we tested whether hyperlactatemia affects food intake in humans. According to a balanced within-subject 2×2 design, 12 healthy, fasted men (age: 20–40years; BMI: 20–26kg/m2) were intravenously infused lactate and saline, respectively, for 105min during concomitant euglycemic and hypoglycemic, respectively, insulin infusion of 75min. Ten minutes after the simultaneous end of infusions, free-choice food intake was assessed at 10:25h. Lactate decreased food intake following euglycemia as compared to the other three conditions in which food intake did not differ. Results point to an anorexigenic effect of lactate under euglycemic conditions.
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