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Mood and Stress Support Dietary Supplement Swanson 5-HTP works within the body to promote healthy levels of serotonin a hormone that helps regulate mood and sleep patterns. 5-HTP supports production of serotonin which regulates mood and is a precursor to melatonin. It supports mental and emotional wellbeing helping to promote a healthy balanced mood. A great formula for daily maintenance needs each capsule provides 50 mg of pure 5-HTP for dependable everyday supplementation.