The Neurocognitive Implications of Triple-Receptor Agonism: A Conceptual and Systematic Analysis of Retatrutide (LY3437943) on Executive Functions, Information Processing, and Energetic Homeostasis

Retatrutide (LY3437943) is a single-peptide agonist of glucose-dependent insulinotropicpolypeptide, glucagon-like peptide-1, and glucagon receptors with substantial metabolicefficacy but an incompletely characterised psychological phenotype. This paper evaluates itsplausible effects on executive control, information processing, food-directed cognitiveinterference, motivational salience, fatigue, and psychophysiological vigor. A structuredevidence synthesis covered literature from 2010 through 10 August 2026 and separated directretatrutide findings from receptor-level and broader cognitive-neuroscience evidence. Humanstudies demonstrate changes in appetite, perceived hunger, disinhibition, dietary restraint,weight-related experience, and treatment-emergent fatigue, but do not directly demonstrateimproved working memory, sustained attention, processing speed, or executive functioning.Constituent receptor literature supports plausible pathways involving satiety, food valuation,reward, and energetic regulation. Accordingly, reduced food-related cognitive interferenceand altered incentive salience remain defensible hypotheses; generalized cognitiveenhancement and anhedonia do not. The proposed model therefore locates retatrutide's mostcredible neuropsychological relevance in altered cognitive competition rather than increasedcognitive capacity, with fatigue as a competing pathway. Dedicated longitudinal measures ofcognition, reward, affect, sleep, and fatigability are required to determine whether retatrutidechanges cognition itself or primarily the conditions under which cognition operates.