A diabetes drug called tirzepatide can help people lose up to 21% of their body weight, but the weight loss tends to stop increasing too soon — especially for those with type 2 diabetes.
Evidence from Studies
Supporting (1)
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Why are we still in need for novel anti-obesity medications?
The study looked at tirzepatide, the same drug in the claim, and found it caused about 23% weight loss, which matches the claim of up to 21%. It doesn’t talk much about the weight loss slowing down, but the main point about how well it works is backed up.
Contradicting (1)
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Efficacy and safety of tirzepatide for weight loss in patients with obesity or type 2 diabetes: a systematic review and meta-analysis
The study shows tirzepatide helps people with type 2 diabetes lose weight, but not as much as claimed, and it doesn’t say anything about the weight loss stopping early.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.