G Jean-Louis, H von Gizycki, F Zizi (Univ of California, San Diego; College of Staten Island, New York)
Melatonin Effects on Sleep, Mood, and Cognition in Elderly With Mild Cognitive Impairment.
J Pineal Res 25: 177-183, 1998.
Melatonin is reputed to improve sleep-wake disturbances but recent studies have not found any significant increase in sleep duration. Inspite of having no significant effect on sleep, melatonin improved mood and performance significantly. It had no observed side effects.