Melatonin Adolescent Research Study

Inclusion Criteria: * Self-identified sleep difficulties (e.g., difficulty falling asleep, staying asleep, or premature waking resulting in short or disrupted sleep). * Ages 13 to 17 years old * Able to understand, read, and write in English * Melatonin naive Exclusion Criteria: * Obesity * Use of psychiatric medication * Drug(s), or supplements known to affect sleep * History of head injury or concussion with loss of consciousness \>1 minute * Daily consumption of \>1 caffeinated beverage * Risk for any organic sleep disorder (e.g., obstructive sleep apnea, restless leg syndrome)