可参考论文:
Low dose melatonin improves sleep in healthy middle-aged subjects (1996)
https://www.ncbi.nlm.nih.gov/pubmed/8856838Sleep‐inducing effects of low doses of melatonin ingested in the evening (1995)
https://ascpt.onlinelibrary.wiley.com/doi/abs/10.1016/0009-9236%2895%2990040-3Endogenous Melatonin Levels and the Fate of Exogenous Melatonin: Age Effects (1998)
https://academic.oup.com/biomedgerontology/article/53A/4/B293/592663Sleep-Facilitating Effect of Exogenous Melatonin in Healthy Young Men and Women Is Circadian-Phase Dependent (2006)
https://academic.oup.com/sleep/article/29/5/609/2708116