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However, injections may be preferred when absorption is a concern because they bypass the digestive system
Intramuscular injection can cause local pain, deep (gluteal) injection is necessary
Cyanocobalamin comes in many forms
Samocha-Bonet D et al
However, they aren't a magic bullet
Clinical research suggested doses in the range of 1-10mcg per kilogram of body weight showed efficacy, though most protocols standardized around 4-6mcg/kg for practical application
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