Chase and Rhonda Are Studying for a Quiz on Vitamins

Chase and Rhonda are studying for a quiz on vitamins. Over the semester break, Chase started taking several dietary supplements including an antioxidant, a multivitamin, and a B-complex supplement to help improve his energy level and nutrient status. Rhonda has been a vegan (consumes no animal products or by-products) for several months. As they study for their quiz, they explore natural sources of the essential vitamins. Chase believes that Rhonda should be taking a multivitamin supplement because of her vegan lifestyle, but Rhonda believes that Chase is likely overdosing on some of the vitamin supplements. Help them study for their quiz, and answer their questions about the need for vitamins. Chase is concerned that Rhonda is not getting some essential vitamins because of her vegan diet. Which vitamin could Rhonda consider supplementing considering the fact that it is only found in animal products and microorganisms?

A) vitamin B₁₂
B) vitamin C
C) vitamin K
D) vitamin E
E) vitamin B₆