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People with a severe deficiency or absorption problems can feel the effect wear off sooner
This is more likely if you have difficulty absorbing vitamin B12 through the digestion system and, therefore, need an injection directly into your muscles and blood
All effects are dose-dependent and typically resolve after dosage adjustment
Avoid contact with eyes
For most patients, B12 injections do not cause any significant long-term health concerns
J., & Gianello, R
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