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Individuals with this condition lack the intrinsic factor we mentioned earlier, which is one of the key proteins responsible for B12 absorption (OLeary, 2010)
If your B12 deficiency is severe, it could take 4-6 weeks of injections before you really start to turn the corner and feel like your old self again
What Is A B12 Shot
Injections go straight into your bloodstream for faster and more complete absorption, especially useful if you have absorption issues
Common side effects include mild injection site reactions (such as pain, redness, or swelling), headache, flushing, dizziness, and nausea
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