Serotonin is the key brain chemical that generates feelings of optimism and relaxation

Serotonin is the key brain chemical that generates feelings of optimism and relaxation, which give you a general sense of well-being. It helps you sleep well by regulating your sleep patterns. Serotonin also enhances certain brain functions such as the ability to focus better. Deficiency in this neurotransmitter results in an inexplicable predisposition to negativity, edginess, insomnia, depression, and poor concentration. You might be feeling bad about yourself for swinging back and forth from being choleric to melancholic. This is why it’s important to treat this neurotransmitter deficiency as your mistaken belief about your ‘naturally’ negative attitude might lead to greater sadness and frustration, which only further compounds your already depressed state.