Gelatin Methacryloyl, 30% methacrylation, blue fluorescent (GelMA, 30% methacrylation, blue fluorescent) is a type of GelMA that incorporates blue fluorescent molecules through its structure. It acts as a scaffold for creating tissue analogs, such as those of the vascular, cartilage, and skeletal systems, promoting cell proliferation and diffusion. Upon exposure to the photoinitiator LAP, it self-assembles into fibrous hydrogels, targeting bioactive adhesion sites to inherently support tissue cells and facilitate biodegradation. Applications include cell culture, bioprinting, and tissue engineering.