Assertion: dietary carotenoid | /r/CapableOf | serve as precursor
Facets:
value: for vitamin a
type: PURPOSE
Source sentences:
text: Some dietary carotenoids, most importantly β-carotene and β-cryptoxanthin, also serve as precursors for vitamin A (retinol), and carotenoid cleavage is an important source of vitamin A for vertebrates (von Lintig 2010 ).