Exhibit 99.1 Fractyl Health Announces First Quarter 2025 Financial Results and Business Updates REVEAL-1 Cohort 3-month open-label data update expected in June 2025; early clinical signals reinforce Revita's potential to maintain weight loss after GLP-1 discontinuation in the real world REMAIN-1 Midpoint Cohort data expected in Q3 2025; first randomized data on post-GLP-1 weight maintenance REMAIN-1 Pivotal Cohort has completed enrollment ahead of schedule; 6-month primary endpoint data anticipated in H2 20 ...