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Table of Contents How Retatrutide and Testosterone Work in the Body Known and Potential Interactions Between These Medicines Who May Be Prescribed Both Treatments in the UK Risks and Safety Considerations to Discuss With Your Doctor Current MHRA and Clinical Guidance on Combining These Drugs When to Seek Medical Advice Before Starting Either Treatment Scientific References Frequently Asked Questions How Retatrutide and Testosterone Work in the Body Retatrutide is an investigational triple incretin agonist (GLP-1, GIP, glucagon) that suppresses appetite and may increase energy expenditure, while testosterone is a licensed androgen that influences muscle mass, insulin sensitivity, and fat distribution both agents affect overlapping metabolic pathways
IGF-1 is a driver of muscle cell growth and recovery, while Follistatin limits myostatin, "the natural 'brake' on muscle growth." TB-500 + BPC-157 + GHK-Cu Dr
Frias JP, et al
