This product is a conditionally defined liver cell culture medium meticulously prepared from specific cell-secreted proteins. Rich in naturally sourced growth factors, cytokines, and extracellular matrix components, it effectively mimics the complex physiological microenvironment in vivo. It significantly enhances the in vitro survival and functional maintenance of primary liver cells and liver cell lines, particularly boosting core liver functions such as albumin synthesis, drug-metabolizing enzyme expression, and ammonia detoxification.