What substance produced by the digestive system is necessary in order to absorb vitamin B-12?Multiple choice question.GastrinSalivary amylaseIntrinsic factorPepsin

Which organ produces the intrinsic factor that enhances vitamin B-12 absorption?Multiple choice question.pancreasliversmall intestinestomach

Vitamin B-12 is required for an enzymatic reaction involved in _____ metabolism.Multiple choice question.alcoholcarbohydratetryptophanhomocysteine

The best source of vitamin B-12 would be _____.Multiple choice question.spinacha hamburgerwhole-grain breadan orange

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

The B vitamin required as a coenzyme to metabolize carbohydrates and some amino acids is _____.Multiple choice question.folatebiotinthiaminvitamin B-12