5-HTP has been known to produce significant effects on food intake in obese populations; research has found that this is done by increasing serotonin which will help avoid food craving, post meal satiety and reduction of pre meal appetite. (23)
23 – Halford, J. C., Harrold, J. A., Lawton, C. L., & Blundell, J. E. (2005). Serotonin (5-HT) drugs: effects on appetite expression and use for the treatment of obesity. Current drug targets, 6(2), 201-213.