Assertion: melatonin's role | /r/HasProperty | vital
Facets:
Source sentences:
text: Melatonin is a neurotransmitterlike substance that plays a vital role in regulating circadian rhythms, which in turn control sleeping patterns, hormone release and body temperature, among many other human functions.
text: As you may imagine, melatonin plays a vital role in creating a quality sleep cycle.
text: Produced naturally in the pineal gland, melatonin is a hormone that plays a vital role in the body's sleep-wake cycle.