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Story perspectives

Retatrutide Cuts HbA1c 1.8 Points, Weight 13%

6/7/2026

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Story summary
  • A phase 3 Lancet trial in the United Kingdom found that retatrutide lowered HbA1c by 1.7–1.9 points and reduced body weight by 11.5%–15.3% over 40 weeks.
  • The trial enrolled 930 adults and recorded 14 serious adverse events, two of which occurred in the placebo arm.
  • Most side-effects were mild gastrointestinal symptoms that resolved quickly.
  • Royal College of Physicians adviser Kath McCullough praised the findings.
  • University of Cambridge specialist Marie Spreckley called for head-to-head trials.