21st Century Melatonin 10mg Prolonged Release Tablets 30's21st Century Extra Strength Melatonin 10 mg Prolonged Release is a dietary supplement designed to support natural sleep. Melatonin works in harmony with the bodys natural sleep cycle to help promote relaxation and restful sleep. This formula uses prolonged release technology, which gradually releases melatonin throughout the night to provide extended sleep support. It is formulated for adults who occasionally experience difficulty falling asleep or