“…Collagen, and its irreversibly hydrolyzed form gelatin, is a water-soluble protein often derived from porcine or bovine sources, but has recently gained interest by being sourced from other animals including fish [ 125 ]. Several examples have highlighted the potential of both collagen and gelatin-based bioinks [ 39 , 45 , 46 , 49 , 109 , 124 , 126 , 127 , 128 ], most commonly combined with extrusion-based technologies due to their thermoresponsive properties [ 124 , 129 ]. Although both collagen- and gelatin-based medical devices have long since been used within clinics to repair damaged tissues [ 124 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 ], it is still far from the standard musculoskeletal repair practice, as it is not consistently successful.…”