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Experts attribute this difference to tirzepatide's dual-receptor mechanism, which influences not only appetite but also metabolic processes such as glucose regulation and fat utilization
For example, a recent study indicated that unlike in mouse islets where tirzepatide stimulates insulin secretion predominantly through the GLP-1R, the therapeutic effects of tirzepatide on human beta and alpha cells require engagement of both the GLP-1R and the GIPR, and in addition, tirzepatide increased glucagon secretion in isolated islets [207]
Retatrutide is a medication from Eli Lilly that is under development for the treatment of type 2 diabetes and obesity
If you fall into any of these buckets, microdosing is unlikely to solve the underlying problem: BMI over 35 with obesity-related conditions (Type 2 diabetes, hypertension, sleep apnea, PCOS) History of bariatric surgery with significant weight regain Plateaued at a microdose for more than 4 to 6 months with no meaningful progress Have tried microdosing twice or more and stopped both times Need to lose more than 50 pounds to reach a healthy weight At BodEvolve Bariatric & Cosmetic Surgery Center, dr Frenzel works with patients across Texas who came in thinking a GLP-1 microdose would be the answer, and left with a clearer plan that actually matched their goals
Since muscle loss is caused by a caloric deficit, in this sense, there's really no difference between preserving muscle during a normal caloric deficit