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So why does vitamin B12 deficiency particularly affect older adults

References Estimated Influenza Illnesses, Medical Visits, and Hospitalizations Averted by Vaccination | Published August 26, 2021

Clinical outcome was evaluated by the modified Rankin Scale (mRS) score at 90 days: a score of 3 was defined as a good outcome

Interestingly, OLIG2 promotes differentiation in oligodendrocyte lineage, but it favors the maintenance of an undifferentiated condition of neural stem cells and progenitor cells (325328)

Heres a quick comparison of B-12 deficiency symptoms vs depressive symptoms: Can B-12 help with depression