Neurotransmitters play a role in nearly every function in the human body. A balance of neurotransmitters is necessary to prevent certain health conditions, such as depression, anxiety, Alzheimer’s disease, and Parkinson’s disease. There is no proven way to ensure that neurotransmitters are balanced and working correctly. However, having a healthful lifestyle that includes regular exercise and stress management can help, in some cases. Before trying a supplement, ask a healthcare provider. Supplements can interact with medications and may be otherwise unsafe, especially for people with certain health conditions. Health conditions that result from an imbalance of neurotransmitters often require treatment from a professional.