LAP (Lithium phenyl-2,4,6-trimethylbenzoylphosphinate) stands out as an exceptionally promising photoinitiator, showcasing a range of remarkable characteristics. LAP represents a water-soluble photoinitiator that finds utility in the polymerization process of hydrogels or bioinks. It demonstrates photocrosslinking capabilities when exposed to 405nm blue light. Notably, LAP holds an advantage over Irgacure 2959, as it exhibits enhanced cytocompatibility, making it a preferred choice in such applications. Additionally, LAP has demonstrated its ability to promote elevated cell viability and glycosaminoglycan (GAG) production in vitro, further bolstering its potential in various applications.