Barry Is a Vegan

question 6

Multiple Choice

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 eats plenty of foods that contain beta-carotene.
• B)His body does not require sources of vitamin A.
• C)He consumes foods that supply tryptophan,which his liver converts to preformed vitamin A.
• D)His fat cells synthesize preformed vitamin A from essential fatty acids.

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