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Conversion Guidelines: 1 mg = 1000 mcg 1 mL = 1000 mcg (standard concentration) A common dosage is a 1 mL injection with 1000 mcg of Vitamin B12
Serine normally reacts with tetrahydrofolate to form glycine and methylenetetrahydrofolate, which is eventually reduced to 5-methyltetrahydrofolate [120]
This stresses the need to pick the right Vitamin B12 injection for each patient
Higher-dose oral B12 (e.g., 1000 g daily) is sometimes used but should only be considered under clinical supervision with appropriate monitoring, particularly in cases of malabsorption where intramuscular treatment remains the first-line approach in UK practice
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