Weight regain now has a timetable — and a Nature mouse study tests the limits of semaglutide enthusiasm
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Study wrapper · #1245

Trends in utilization of glucagon-like peptide‑1 receptor agonists, sodium-glucose cotransporter‑2 inhibitors, and metabolic bariatric surgery in U.S. Adults with diabetes and obesity.

Wartko PD, Zhang R, Johnson E, et al. Diabetes research and clinical practice. 2026.

Editor's note

This is market-structure data rather than an efficacy study, and it quantifies two things the field discusses anecdotally: the near-total shift of metabolic care toward incretin drugs, and how leaky real-world use is — roughly half of initiators discontinue within a year. Tirzepatide leading on adherence and persistence is a competitive signal worth watching. Limitations are those of claims data: no reasons for discontinuation, no cash-pay or compounded use captured, and a privately insured population that may not generalize.

Plain-language abstract

Using insurance claims and health records from over 335,000 US adults with type 2 diabetes and obesity, researchers tracked which weight and glucose therapies people actually start and stick with. GLP-1 drugs dominated new starts, with semaglutide accounting for 62% and tirzepatide 33% of GLP-1 initiations in 2024, while bariatric surgery has become rare. Notably, only about half of patients were still on their medication a year later, and tirzepatide had the best adherence of the group.