Serotonin is a chemical that your body produces from an amino acid called tryptophan. It acts as a Neurotransmitter, which means it carries signals between nerve cells in your brain and other parts of your body. Serotonin affects many functions, such as mood, sleep, appetite, digestion, nausea, wound healing, bone health and sexual desire. Serotonin levels that are too high or too low can cause problems for your physical and mental health .
Free will is a philosophical concept that refers to the ability of human beings to make decisions or perform actions independently of any prior event or state of the universe. In this article, we will discuss it's meaning and philosophical traditions.