How common is vitamin B-12 deficiency in Alzheimer disease (AD) in Down syndrome (DS)?

Updated: Nov 13, 2019
  • Author: Norberto Alvarez, MD; Chief Editor: Jasvinder Chawla, MD, MBA  more...
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Vitamin B-12 deficiency has been reported in several individuals with DS and AD; however, replacement therapy does not change the evolution of the underlying disease.

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