Glutathione is a substance naturally produced by the liver that is also present in some foods (fruit, vegetables and meats). From a chemical point of view it is a tripeptide formed by the amino acids cysteine, glycine and glutamate. Glutathione is primarily known for its function as a natural antioxidant produced by the body itself. In cells and organs it participates in various processes, from the production and repair of tissues to the synthesis of proteins and other molecules, passing through involvement in the immune system. Administered directly into a vein, it is used to reduce the effects of chemotherapy treatments against cancer and against Parkinson’s, diabetes, anemia associated with dialysis, atherosclerosis and male fertility problems. By inhalation, glutathione is instead proposed for example in the treatment of lung diseases.