Bethesda (MD: NIDA (2024)
How Each Medication Works in the Body Retatrutide activates GLP-1, GIP, and glucagon receptors to suppress appetite and promote weight loss, whereas tesamorelin stimulates pituitary growth hormone release to reduce visceral fat via the GH axis
Updated 2026/04/28
Testosterone products carry additional formulation-specific warnings - including blood pressure increases, blood clot risk, elevated hematocrit, fertility effects, and prostate-monitoring considerations - covered in more detail in the safety section above
If you want a broader look at whether GLP-1 therapy is a good fit overall, our guide on whether GLP-1s are bad for you is a helpful place to start
This is one mechanism linking methylation dysfunction to elevated catecholamines, histamine intolerance, and impaired xenobiotic clearance