Bioactive glass 45S5 is a recognized reference material, extensively studied across multiple fields of tissue engineering. Owing to its unique composition (45% SiO₂, 24.5% CaO, 24.5% Na₂O, 6% P₂O₅), it exhibits high reactivity in biological environments, releasing therapeutic ions that trigger cellular responses and support the regeneration of different tissue types. Glass2med provides several particle sizes, and the bioactive glass formulation can be slightly customized (40-53 SiO₂; 20-26 CaO, 23-28 Na₂O; 4-6 P₂O₅).