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.

What is one of the major risk factors for developing vitamin B12 deficiency?

Aging population
High carbohydrate diet
Excessive exercise
Smoking tobacco

The correct answer is: Aging population

One of the major risk factors for developing vitamin B12 deficiency is the aging population. As individuals age, the ability to absorb nutrients, including vitamin B12, often diminishes due to changes in the gastrointestinal tract, including decreased production of intrinsic factor, which is necessary for B12 absorption. Older adults may also have diets that do not include sufficient sources of this vitamin, or they may take medications that affect absorption. Thus, the prevalence of B12 deficiency is notably higher among older adults, making age a significant risk factor.