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The four most clinically relevant variants are GLP1R rs6923761 (appetite receptor sensitivity), GIPR rs1800437 (dual-pathway activation), FTO rs9939609 (metabolic set-point), and MC4R rs17782313 (appetite signaling)

Wang XJ, Gao H, Li HP, Li SQ, Zhang LP, Gao X, et al

tirzepatide against placebo never against each other

Research indicates that genetic variation in GLP-1 receptor (GLP1R), glucose-dependent insulinotropic polypeptide receptor (GIPR), and metabolic genes like FTO and MC4R may influence individual response to GLP-1 agents, though clinical application is still evolving

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Mechanisms matter, but so does methodological discipline