The embodiments herein relate to a therapeutic method for the treatment of Parkinson disease, other neurodegerative disorders, and autoimmune diseases. The method includes providing sodium thiosulfate through any method of administration (orally, intravenously, through inhalation, intravesically, vaginally, rectal route, sublingually, ophthalmically, or topically) and is given with one or more pharmaceutically acceptable carriers or excipients. The sodium thiosulfate safely and endogenously generates H2S in sufficient quantities in the human body to therapeutically treat damaged brain neurons.
