There are 2 major types of serotonin. Serotonin in the brain can curb cravings, shut down appetite, and make you feel more satisfied. However, the other type of serotonin, peripheral serotonin that may be increased in large part by eating a high fat diet, can actually lead to obesity, and diabetes. What is Serotonin Serotonin is a chemical that nerve cells produce. It sends signals between your nerve cells.It is believed that serotonin plays a role in regulating your mood. Serotonin is often called the “happy chemical”, because it is believed to contribute to well being and happiness. The intestines and the brain produce serotonin. Serotonin is also present in…