Effect of melatonin supplementation on sleep quality: a systematic review and meta-analysis of randomized controlled trials

ConclusionWe found that the treatment with  exogenous melatonin has positive effects on sleep quality as assessed by the Pittsburgh Sleep Quality Index (PSQI) in adult. In adults with respiratory diseases, metabolic disorders, primary sleep disorders, not with mental disorders, neurodegenerative diseases and other diseases.
Source: Journal of Neurology - Category: Neurology Source Type: research