Glutathione IV Therapy in Colorado Onus IV Glutathione IV Treatment in Los Angeles Dr. Lalezar, D.O. Dopamine, often called the feel good chemical, plays a significant role in our motivation and happiness. However, not all dopamine sources are created equal. While fake dopamine can give you instant gratification, it Parkinson's Disease: Neurodegeneration of Dopamine Pathways Parkinson's disease is a progressive neurodegenerative disorder primarily affecting movement. It is characterized by the loss of dopamine producing neurons in the substantia nigra, a region of