Central nervous system uptake of intranasal glutathione in Parkinson's disease npj Parkinson's Disease Ways to Boost Your Glutathione Levels for Optimal Health Deanna Minich 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 Frontiers Functional and pharmacological role of the dopamine D4 receptor and its polymorphic variants Dopamine Nutrients Dopamine Supplements Seeking Health