Acknowledgment - An-Najah National University

Development of a Vitamin B12 deficiency that is unrelated to lack of intrinsic factor (pernicious anemia) is not uncommon among adults over age 65, but the nonspecific pattern of symptoms associated with a deficiency of this vitamin (e.g., depression, dementia, lassitude, memory loss, unsteady gait, numbness and tingling in the extremities, etc ... ................
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