Name	Info	Provider	Link
Vitamin A	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamina.html
	free resource	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0014-5793&date=1980&volume=117&issue=1&spage=363