Assertion: vitamin | /r/HasProperty | obtained for the most part
Facets:
value: from the diet
type: OTHER
Source sentences:
text: For the most part, vitamins are obtained from the diet, but some are acquired by other means: for example, microorganisms in the gut flora produce vitamin K and biotin; and one form of vitamin D is synthesized in skin cells when they are exposed to a certain wavelength of ultraviolet light present in sunlight.