Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0022-3166(22)03029-2
Vitamin D	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamind.html
Full text from	free resource	CORE	https://core.ac.uk/reader/225355170?utm_source=linkout
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/jn/article-lookup/doi/10.3945/jn.111.139121