200mg 5-htp + vitamin b6 & hemp oil for ultra serotonin supplement support + natural stress relaxation, mood & sleep boost, extra strength extended time release smartervitamins mood enhancing supplement - 5-htp is a natural precursor to serotonin, the "feel good" brain chemical that helps regulate our moods and reduce anxiety and stress. 5-htp promotes relaxation in a 100% drug-free way for a calm and relaxed mood by enabling the body's synthesis of serotonin, the chemical messenger that greatly helps in enhancing mood.