CLAIM #37042 · Eli Lilly and Company (LLY) · 2025Q3 earnings call · Oct 30, 2025 · due Dec 31, 2026
“we expect retatrutide can deliver deeper and more rapid weight loss than existing obesity medicines even more than tirzepatide.”
Dr. Dan Skovronsky · Chief Scientific Officer
How to check this claim
Look at: Percent mean body weight reduction for retatrutide vs. tirzepatide, as reported from Phase III TRIUMPH trial results
It came true if: Retatrutide mean weight loss percentage exceeds the corresponding tirzepatide comparator/historical Phase III result reported in the same or comparable trial
Where: Company press release / clinical trial results disclosure (TRIUMPH Phase III readouts) and peer-reviewed publication
In context
“itching to orforglipron is a high bar given the strong efficacy of tirzepatide as a dual incretin agonist. As this trial includes moving patients off of an active therapy onto a placebo maintenance arm ATTAIN-MAINTAIN allows patients who are randomized to placebo to switch to orforglipron as a rescue therapy if weight regain exceeds a specified threshold. This will be a rich data package, and we look forward to seeing the results in the coming months, either late this year or early next year. Moving to retatrutide, our GIP GLP-1 glucagon triple agonist. We expect results from up to 6 Phase III studies by the end of 2026 to support the obesity and related complications program called TRIUMPH and the type 2 diabetes program called TRANSCEND. With its first-of-a-kind triple acting mechanism, we expect retatrutide can deliver deeper and more rapid weight loss than existing obesity medicines even more than tirzepatide. Of course, not all patients may need this potentially very high level of efficacy. And we believe retatrutide will likely be best suited for patients with a very high BMI or with obesity-related complications that require a high degree of weight loss. While the global development program for retatrutide includes people with a broad range of BMIs, spanning across overweight and obesity, we anticipate we'll be focused on the clinical profile of this medicine in patients where the clinical needs are at the highest. The first trial to readout TRIUMPH-4 compares retatrutide to placebo in patients with obesity and knee osteoarthritis pain. This 68-week study is designed primarily as a pain relief study to support an indication for treatment of knee osteoarthritis pain in combination with other”
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SEC filings for LLY ↗ · Claim quote is verbatim from the 2025Q3 earnings call.