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.
References:
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.