About: http://webisa.webdatacommons.org/70421039

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	For this reason, calcium is an essential nutrient, particularly during periods of bone growth and in the later years of life when bone tends to become brittle because of bone mineral losses associated with aging.
http://www.w3.org/ns/prov#wasQuotedFrom	muscleandstrength.com