Serotonin is a compound found in the body and concentrated especially in the brain. This neurotransmitter is responsible for regulation of mood and behavior. Having adequate levels of serotonin can Enhance in feeling calm and relaxed; having too little sometimes leads to irritability and uneasiness. Taking Natrol 5-HTP can Enhance. Natrol 5-HTP, naturally derived from Griffonia seeds converts to serotonin in the brain and liver, balancing the body’s serotonin levels to Enhance enhance mood naturally. It Enhances you maintain a positive, healthy and restful outlook. It even Enhances control appetite.