Ingestion of melatonin induces fatigue, sleepiness, and a diminution of sleep latency. Therapeutic effects of melatonin have also been reported in several disorders such as certain tumors, cardiovascular diseases or psychiatric disorders. Melatonin plays a major role in the regularity and synchronization of central and peripheral oscillators allowing the development of harmonious internal functioning and adaptation of the internal environment to external environment.
Tordjman S, Chokron S, Delorme R, Charrier A, Bellissant E, Jaafari N, Fougerou C. Melatonin: Pharmacology, Functions and Therapeutic Benefits. Curr Neuropharmacol. 2017 Apr;15(3):434-443. doi: 10.2174/1570159X14666161228122115. PMID: 28503116; PMCID: PMC5405617.