doi:10.1002/14651858.CD004655.pub2
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methyl-B12, 25 mg daily for 10 days followed by 25 mg monthly for 5 months
People With Gastrointestinal Issues As mentioned above, if youre suffering from any gastrointestinal disorders, you may be at a higher risk of Vitamin B12 deficiency
Masking of folic acid deficiency: B12 supplementation may correct hematological abnormalities associated with folic acid deficiency while leaving neurological damage unaddressed
This complex process means that conditions affecting the stomach or intestines can significantly impair B12 absorption, including pernicious anaemia, atrophic gastritis, previous gastric surgery, coeliac disease, Crohn's disease, and long-term use of certain medications (such as metformin, proton pump inhibitors, and H2 antagonists)