Malabsorption (inadequate intake of vitamin B12 in the intestine) Insufficient production of intrinsic factor (a protein that is produced in the gastric mucosa and is required for the absorption of vitamin B12), Diseases in the terminal part of the ileum (part of the small intestine), eg
Our medical team at Eluma Laser and Aesthetics Jacksonville, Florida, has helped many patients use B12 injections to resolve feelings of fatigue or improve their weight-loss efforts
Vasanthasree Nair MBBS Last updated on 13th Jan, 2026 Introduction Its common to hear conversations about low vitamin B12, but seeing a high vitamin B12 level in your blood test results can be unexpected
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B Vitamins and the Brain: Mechanisms, Dose and Efficacy - A Review
It works with the FSH in the testicles to support fertility