Assertion: vitamin d's form | /r/HasProperty | hormone
Facets:
Source sentences:
text: The active form of vitamin D is indeed a hormone and is known as 1,25-dihydroxyvitamin D3 [1,25(OH) 2 D3] or calcitriol.
text: When vitamin D3 is eaten by your dog, it needs to be converted into a usable form (which is actually a hormone).