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Nevertheless, you may feel unsure about bringing needles and medicine with you
Those who cannot absorb B12 adequately from food require supplementation
The most common side effect is temporary mild irritation at the injection site
Among the 25 studies included in the qualitative synthesis (16 in the meta-analysis), 15 focused specifically on serum cobalamin changes (reported by baseline and post-treatment means and standard deviations in pg/mL) and 10 reported homocysteine outcomes (means and standard deviations in mmol/L)
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