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Check fasting glucose every seven days for the first four weeks

For now, use of GLP-1s specifically for obesity continues to be excluded from Medicare coverage by law

Journal of Nutrition , February 2026

While traditional GLP-1 agonists focus on a single pathway, retatrutide functions as a triple agonist, integrating signals from three distinct metabolic receptors: GLP-1: Associated with slowed gastric emptying, appetite modulation, and glucose-dependent insulin secretion

Altogether, the regulation of the HPA axis, plasma CBG levels, and tissue expression of 11-HSD enzymes ultimately determine cortisol bioavailability, which, in conjunction with tissue-specific GR expression and function, dictates the specific biological responses