Assertion: beta carotene | /r/HasProperty | converted to vitamin a
Facets:
value: in the intestine
type: LOCATION
value: effectively
type: MANNER
value: in humans
type: LOCATION
value: on an as-needed basis
type: MANNER
Source sentences:
text: Beta-carotene is a better source of vitamin A than vitamin A supplements because it is only converted to vitamin A on an as-needed basis; excess beta-carotene is stored in the body and unlike vitamin A, is not toxic when taken in amounts in excess of body needs.
text: The trial concluded that "beta-carotene derived from golden rice is effectively converted to vitamin A in humans".
text: Although plants do not have vitamin A, dark green leafy vegetables and yellow fruits and vegetables (e.g., carrots, sweet potatoes, cantaloupe, corn, and peaches) contain a substance called beta-carotene, which is converted to vitamin A in the intestine and then absorbed by the body.