S-(5′-Adenosyl)-L-methionine p-toluenesulfonate salt is widely used in biochemical research and pharmaceutical applications. It serves as a key methyl donor in various enzymatic reactions, particularly in the study of methylation processes in DNA, RNA, and proteins. This compound is also employed in the synthesis of neurotransmitters and other biomolecules, making it valuable in neuroscience and metabolic research. Additionally, it is utilized in the development of therapeutic agents for liver disorders, depression, and osteoarthritis due to its role in cellular repair and anti-inflammatory pathways. Its stability and bioavailability make it a preferred form for experimental and clinical studies.