This has not been confirmed in humans, but as a precaution, neither drug should be used by people with a personal or family history of medullary thyroid cancer (MTC) or a rare genetic condition called MEN2

After 24 weeks, all groups taking retatrutide saw significant weight loss compared to the placebo group (1.6% average weight loss): 7.2% for those taking 1 mg 11.8% for those taking 4 mg after starting with 2 mg 13.9% for those taking 4 mg after starting with 4 mg 16.7% for those taking 8 mg after starting with 2 mg 17.9% for those taking 8 mg after starting with 4 mg 17.5% for those taking 12 mg after starting with 2 mg After 48 weeks, patients taking retatrutide experienced even more substantial losses: 8.7% for those taking 1 mg 16.3% for those taking 4 mg after starting with 2 mg 17.8% for those taking 4 mg after starting with 4 mg 21.7% for those taking 8 mg after starting with 2 mg 23.9% for those taking 8 mg after starting with 4 mg 24.2% for those taking 12 mg after starting with 2 mg The researchers also reported that 100% of patients taking 8 mg or 12 mg saw a weight reduction of at least 5%, and 7583% had a weight reduction of 15% or more

Our complete semaglutide vs tirzepatide comparison guide covers this in detail, but here are the key differences in weight loss outcomes: Average Weight Loss Comparison Semaglutide (STEP-1 trial, 68 weeks): Average weight loss: 14.9% 69.1% lost 10% or more 50.5% lost 15% or more Tirzepatide (SURMOUNT-1 trial, 72 weeks at 15 mg dose): Average weight loss: 22.5% 89% lost 10% or more 78% lost 15% or more Tirzepatide shows higher average weight loss in clinical trials, though both medications demonstrate significant effectiveness
TB-500 research focuses on soft tissue repair and inflammation pathways
But here's what you should know: every clinical trial result published so far comes from the injectable version
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