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For more tips from our Medical co-author, including how to safely dispose of your needle after injecting B12, read on
You can fill your prescription at any local pharmacy
Injections are very effective at raising blood levels of vitamin B12 and preventing or reversing a B12 deficiency
B12 injections are especially useful for people with a B12 deficiency, which tends to stem from difficulties absorbing the nutrient, not falling short nutritionally, says Foxx
Side effects of B12 shots Vitamin B12 injections are considered safe, but common side effects include diarrhea and swelling
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