BMP8B (bone morphogenetic protein 8b) is a member of the transforming growth factor-beta superfamily with diverse physiological roles. Primarily, BMP8B promotes bone and cartilage formation and plays roles in calcium regulation and bone homeostasis 1. BMP8B functions through SMAD2/3 and SMAD1/5/9 signaling pathways to regulate cellular differentiation and developmental processes 2. In reproductive biology, BMP8B mutations are associated with primary ovarian insufficiency (POI), highlighting its importance in ovarian development and meiosis 1. BMP8B also regulates thermogenesis in brown adipose tissue, emerging as a potential therapeutic target for obesity management 34. Clinically, elevated hepatic BMP8B expression correlates with disease severity in non-alcoholic steatohepatitis (NASH), where it promotes hepatic stellate cell activation via TGF-β-BMP signaling, driving inflammation and fibrosis 25. BMP8B inhibition represents a promising therapeutic approach for NASH, given its near-absence in healthy livers 2. Additionally, BMP8B has been implicated in broader metabolic-associated fatty liver disease pathophysiology 6, and its expression is dysregulated in inflammatory bowel disease 7. These findings position BMP8B as a multifunctional regulator with significant disease relevance in metabolic, developmental, and inflammatory pathologies.