b12 injection and pfizer vaccine FDA approves Pfizer-BioNTech's Omicron XBB.1.5-adapted FDA signs off on updated

Diagnosis of Vitamin B12 Deficiency The diagnosis of vitamin B 12 deficiency has traditionally been based on low serum vitamin B 12 levels, usually less than 200 pg per mL (150 pmol per L), along with clinical evidence of disease

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Patients with pernicious anaemia, malabsorption disorders (such as Crohn's disease or coeliac disease), or following gastric surgery require regular B12 supplementation to prevent serious complications including megaloblastic anaemia and neurological damage