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However, some people have difficulty absorbing vitamin B12 from their diet, including dietary restrictions, certain medical conditions like pernicious anemia, or medications that interfere with B12 absorption
If you experience severe pain, signs of infection (redness, warmth, swelling), or an allergic reaction (rash, itching, difficulty breathing), seek medical attention immediately
Smaller vials (2ml10ml) are suited for single-dose antibiotic, vaccine, or hormonal reconstitution
According to the National Institutes of Health, only about 1 to 2 percent of an oral dose actually makes it into your bloodstream