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Thats a significant hit to your resting metabolic rate, since muscle tissue is metabolically active in ways that fat tissue isnt

The Overlap Risk: Why Concurrent Use Is Not Recommended The Pharmaceutical Journal (Royal Pharmaceutical Society, December 2025) states that concurrent administration of tirzepatide and semaglutide "could heighten side effects" due to their "overlapping incretin activity." When both drugs are active simultaneously, the GLP-1 receptor faces amplified agonist load

Injection of exendin-4 into the LH reduced lever-pressing behavior, while injection of exendin-9, a GLP-1R antagonist, increased food reinforcement

Clinical Update 6/24/2025 Is N-Acetylcarnosine the Same as L-Carnosine