Barry is a vegan.His diet does not include foods that contain preformed vitamin A,and he does not take any vitamin A supplements.Nevertheless,his body has adequate vitamin A stores.Which of the following statements provides the best explanation for Barry's adequate vitamin A status?
A)He consumes foods that supply tryptophan,which his liver converts to preformed vitamin A.
B)His fat cells synthesize preformed vitamin A from essential fatty acids.
C)He eats plenty of foods that contain beta-carotene.
D)His body does not require sources of vitamin

Question

Quizplus · Accepted Answer

Barry's adequate vitamin A status can be attributed to his consumption of foods that contain beta-carotene, which his body can convert into vitamin A. Beta-carotene is a precursor to vitamin A, and the body can convert it into the active form of vitamin A as needed. As a vegan, Barry may consume a diet rich in fruits and vegetables that contain beta-carotene, which can explain his adequate vitamin A stores despite not consuming preformed vitamin A or supplements.

Barry Is a Vegan