Metsera reports positive Phase 2b results for first- and best-in-class ultra-long acting GLP-1 RA Candidate MET-097i, enabling rapid transition into Phase 3
NEW YORK, Sept. 29, 2025 (GLOBE NEWSWIRE) -- Metsera, Inc. (Nasdaq: MTSR), today announced positive topline data from VESPER-1 and positive data from a planned interim analysis for tolerability of VESPER-3 -- two Phase 2b trials of MET-097i, a first-in-class fully biased, ultra-long acting GLP-1 receptor agonist (RA) with potential for monthly dosing. In VESPER-1, MET-097i demonstrated mean placebo-subtracted weight loss of up to 14.1% after 28 weekly doses. MET-097i demonstrated potentially class-leading tolerability in both trials. At the highest evaluated dose in VESPER-3, there was minimal diarrhea signal and a risk difference from placebo of 13% nausea and 11% vomiting at 12 weeks after two titration steps.