Apitegromab for lean mass preservation during tirzepatide-induced weight loss: a randomized, double-blind, placebo-controlled phase 2 trial
Richard E. Pratley / nature - Nature Medicine, Published online: 08 June 2026; doi:10.1038/s41591-026-04440-4In the phase 2 EMBRAZE study, participants receiving tirzepatide and apitegromab lost less lean mass compared to participants receiving tirzepatide and placebo.
AI Summary: A randomized, double‑blind phase 2 trial found apitegromab helped preserve lean mass in people losing weight on tirzepatide (a GLP‑1–class obesity medication). The drug reduced treatment‑associated muscle wasting without undermining weight loss, positioning apitegromab as a potential adjunct for patients worried about strength and frailty during aggressive metabolic therapy.