Preformed vitamin A as a retinoid is found in the foods of animal origin as _______.Multiple choice question.retinolalpha-tocopherolluteinbeta-carotene

____________________ is the form of vitamin A found in animal-derived foods.答案选项组Retinoic acidRetinalRetinolNo answer text provided.

Which of the following is the term used for the biologically active forms of vitamin A?Multiple choice question.RetinoidsTocopherolsPhylloquinoneAscorbic acid

Select all that applyThe sources of retinoids, the preformed source of vitamin A, include _____. Multiple select question.beef liverfortified milkcarrotsfortified margarine

Vitamin B-12 is found in ______ foods only.Multiple choice question.animalfortifiedplantfresh

Dark green and yellow-orange vegetables are sources of _____.Multiple choice question.carotenoidsretinoidspreformed vitamin A