Eli Lilly, the manufacturer of the GLP-1 / GIP agonist tirzepatide (Mounjaro, Zepbound) has announced the development of bimagrumab (LY3985863), an injected monoclonal antibody that binds the activin/myostatin type II receptors ActRIIA and ActRIIB and blocks ligand binding
The data available to date across thousands of patients in controlled trials and growing real-world use support a generally favorable safety profile consistent with the GLP-1 class
When tirzepatide changes daily routines, eating patterns, and coping strategies, previously managed anxiety can surface in ways that feel new and medication-related
Any stack involving multiple experimental compounds increases the unknowns around safety and interactions
Once drawn into a syringe, the peptide has greater surface area exposure to air and plastic, potentially accelerating degradation