Assertion: melatonin | /r/HasProperty | critical
Facets:
value: for healthy sleep
type: PURPOSE
Source sentences:
text: Melatonin, of course, is critical for healthy sleep.
text: It is also a master hormone regulator and a critical player in regulation of the menstrual cycle and the digestive process.
text: Melatonin, of course, is critical for healthy sleep.