Assertion: melatonin | /r/HasProperty | three months
Facets:
Source sentences:
text: There's no evidence that warrants advising against taking melatonin every day, but keep in mind that the majority of clinical trials to date have only tested short-term use of melatonin (three months or less), and that more research is needed to determine if it's safe to take melatonin every day for a long time.