Assertion: melatonin | /r/CapableOf | act as modulator
Facets:
value: for immune health
type: PURPOSE
Source sentences:
text: Melatonin acts as a mediator between the thermoregulatory and arousal system in humans, as well as a modulator for immune health, as there is at least 400 times more melatonin in the gastrointestinal tract than in the pineal gland.