About: http://webisa.webdatacommons.org/247747869

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Vitamin D is an essential vitamin, however, the National Center for Health Statistics (NCHS) reports that approximately one-third of Americans have low levels of Vitamin D.
http://www.w3.org/ns/prov#wasQuotedFrom	vitacost.com