This is a tripeptide found in almost all tissues and plays influential roles in various critical processes such as maintaining redox balance, reducing oxidative stress, increasing metabolic detoxification, and regulating immune system function. Multiple functions of glutathione such as neurodegeneration and mitochondrial dysfunction suggest that it may be a significant biomarker and therapeutic target for pathological changes. It has been argued that many diseases such as Alzheimer’s disease, cancer, chronic liver disease, diabetes, hypertension, and Parkinson’s disease are associated with insufficient glutathione, but studies are ongoing.