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For less urgent concerns such as persistent injection site pain with spreading redness or unexpected symptoms, contact your GP or call NHS 111
Short answer: If you can absorb B12, high-dose oral B12 (1,0002,000 mcg/day) is as effective as intramuscular injections for normalizing levels in most people (AAFP
These signs could easily go unnoticed or be confused with a worm burden
Bioavailabilit y: Oral B12 supplements require intrinsic factor, a protein in the stomach, for absorption
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