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The most common causes include B12 supplementation (particularly injections), liver disease releasing stored B12, haematological disorders increasing B12-binding proteins, and chronic kidney disease reducing B12 excretion
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Laboratory Monitoring Guidelines Regular lab tests are key to checking if B12 injections are working
References Nahin RL
Clinician oversight Anyone considering peptide research protocols with active health conditions or current medications should work with a qualified clinician
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