Certified Neuroscience Registered Nurse (CNRN) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the CNRN Exam. Test your knowledge with our comprehensive multiple-choice questions and detailed explanations. Boost your confidence and improve your chances of a successful exam outcome!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which dietary sources are rich in Vitamin B12?

Dark leafy greens
Eggs and dairy products
Citrus fruits
Whole grains

The correct answer is: Eggs and dairy products

Vitamin B12 is essential for several bodily functions, especially in red blood cell formation, DNA synthesis, and maintaining the health of nerve cells. It is primarily found in animal-based foods, which makes dietary sources particularly important for individuals seeking to meet their nutritional needs for this vitamin. Eggs and dairy products are notable sources of Vitamin B12 due to their high content of this nutrient. Eggs, particularly the yolk, and dairy items such as milk, cheese, and yogurt, provide significant amounts of Vitamin B12, making them critical components of the diet for those who consume animal products. In contrast, other sources listed do not contain Vitamin B12 in appreciable amounts. Dark leafy greens, while rich in various vitamins and minerals, typically do not provide Vitamin B12. Citrus fruits, known for their vitamin C content, lack this vitamin as well. Whole grains may have several health benefits and provide nutrients like fiber and B vitamins, but they are not reliable sources of Vitamin B12. Therefore, eggs and dairy products stand out as the correct answer because they directly contribute to the intake of this important vitamin in the diet.