Can fat mass fall while lean mass increases?
48 weeks; IV bimagrumab every 4 weeks, with diet and exercise counseling in both groups.
At 48 weeks, fat mass changed by −20.5% with bimagrumab versus −0.5% with placebo; lean mass changed by +3.6% versus −0.8%.
The report analyzed treatment completers, which can affect interpretation. The abstract provides limited adverse-event detail.
The result supports studying activin-receptor blockade for body composition.
What might this mean, and what would change the interpretation?
75 adults with type 2 diabetes and overweight or obesity were randomized; 58 completed. This was not a GLP combination trial and does not establish preserved strength.
What would clarify this: Controlled combination trials measuring both muscle composition and function.
Findings reviewed · abstract
Checked Sep 15, 2026 against the linked abstract. This reading note is not a formal risk-of-bias appraisal.