* Dietary Supplement * Stress-Relax. * 5 mg Chewable * Resets Sleep-Wake Cycle * Recommended By Dr. Michael Murray * Purity & Potency Guaranteed Melatonin can help to provide a more restful and natural sleep without and drowsy side-effects. All Natural Factors products are manufactured in accordance with the Government of Canada"s Good Manufacturing Practices (GMP), among the highest standards in the world.