Certified Neuroscience Registered Nurse (CNRN) Practice Exam

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.