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[7] [8] Intrinsic factor antibodies may be tested if pernicious anaemia is suspected
While B12 is naturally found in animal-based foods, some individuals may struggle to absorb enough of it through their diet alone
This route offers several advantages: it is easy to perform, relatively painless with proper technique, and provides good systemic absorption
The mouse study reported no observed adverse effects at its tested dose, but that does not establish human safety at any dose or route
One can use oral antihistamines and over the counter topical steroids for a few days to help these symptoms
This guide breaks down what they are, what the research points to, and how to think about next steps
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