Defined Bioscience is a San Diego–based biotechnology company developing chemically defined, animal-free reagents and media for stem-cell and cultivated-meat research. Founded by scientists from the stem-cell and regenerative biology fields, the company focuses on improving reproducibility, reducing serum dependency, and simplifying workflows through thermostable growth factors, defined media supplements, and ready-to-use cell culture reagents. Backed by collaborations with academic and industry partners, Defined Bioscience combines scientific precision with scalable production to deliver consistent, high-performance materials for cell-based food and biomedical applications.