FGF2-STAB is a stabilised growth factor that offers a novel way to grow FGF2-dependant cell cultures more efficiently with fewer media changes. FGF2-STAB retains full biological activity even after 5 days at 37°C. This stability allows for a more homogenous, undifferentiated stem cell culture, while saving researchers valuable time and money because repeated supplementation of FGF2 and daily media changes are not required.