(RS)-Mevalonic acid lithium salt is primarily used in biochemical research to study the mevalonate pathway, which is crucial for the biosynthesis of isoprenoids, sterols, and other essential biomolecules. It serves as a precursor in enzymatic assays to investigate the activity of enzymes like HMG-CoA reductase, a key enzyme in cholesterol synthesis. This compound is also employed in metabolic studies to understand cellular processes related to lipid metabolism and regulation. Additionally, it finds application in the development of therapeutic strategies targeting diseases associated with dysregulated mevalonate pathways, such as certain cancers and metabolic disorders. Its lithium salt form enhances solubility, making it more suitable for experimental use in aqueous systems.