Term Name:	vitamin A biosynthetic process
Synonyms:	vitamin A anabolism, vitamin A biosynthesis, vitamin A formation, vitamin A synthesis
Definition:	The chemical reactions and pathways resulting in the formation of any of the vitamin A compounds, retinol, retinal (retinaldehyde) and retinoic acid. Animals cannot synthesize vitamin A de novo, but form it through oxidative cleavage of carotenoids.
Ontology:	GO: Biological Process [GO:0035238]    QuickGO    AmiGO