glp 1 is semaglutide Details of failed studies cast pall on Novo Nordisk's GLP-1 as Alzheimer's treatment Tirzepatide vs. Semaglutide: What You

Others report changes in energy levels that fluctuate before stabilizing

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(Endocrinology, 2010), demonstrated a strong species-dependent effect: In rodents: High GLP-1 receptor expression in thyroid C-cells Strong cAMP signaling activation Persistent stimulation leads to tumor formation In humans and primates: Minimal or absent functional GLP-1 receptor expression in C-cells No meaningful calcitonin elevation under therapeutic exposure No observed C-cell proliferation in long-term studies Even exposure levels far exceeding clinical doses failed to reproduce rodent-like thyroid effects in primate models

No significant sex- or weight-based risks were noted for liraglutide or tirzepatide

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