Moodiness, increased anxiety and sleep disorders are some of the signs that your serotonin levels may be out of balance. Serotonin is an essential neurotransmitter in the brain that helps regulate mood and relaxation. Normal levels of serotonin allow for balanced moods and healthy sleeping patterns while a serotonin deficiency may even result in increased depression and weight gain. 5-HTP (5-hydroxytryptophan) is a substance produced in the body after eating foods (such as turkey) containing the amino acid L-tryptophan. The body utilizes 5-HTP to produce serotonin. Clinical studies show 5-HTP can help normalize serotonin levels. Natureâ€˜s HarmonyÂ® 5-HTP, a naturally sourced extract from the seeds of the Griffonia Simplicifolia plant, helps reestablish normal serotonin levels in the brain, promoting balanced moods and healthy sleeping patterns.