In vitro culture techniques are considered highly significant because they facilitate the enhanced production of secondary metabolites. This chapter provides a detailed protocol for optimizing the production of specific secondary metabolites in plant cell cultures (suspension cultures) through advanced in vitro techniques. This focuses on improving culture preparation methods and supplementing growth media with precursor molecules to enhance metabolite yields. The chapter also outlines the procedure for establishing and maintaining plant cell suspension cultures, the integration of precursor compounds, and the subsequent analysis of metabolite concentrations and compositions. By providing step-by-step instructions and practical insights, this chapter aims to improve secondary metabolite production and advance biotechnological applications in plant science.