For most people, daily oral methylcobalamin is more practical than chasing B12 energy shots, which are really designed for confirmed deficiency or malabsorption
There are risks involved in doing this, including injection-site redness, itching, or irritation, temporary fatigue or drowsiness, headache, nausea, mild water retention and bloating
A non-sanitized rubber stopper may harbor environmental microorganisms
In contrast, cyanocobalamin is an inactive, synthetic, slightly-toxic form of B12 that the body must convert
A shake does not require the same appetite that a large meal demands
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