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Hair operates on long growth cycles, so visible improvements take time
Waiting for diagnosis carries a high risk, while injecting B12 carries no risk
Most patients have no side effects
Oral administration of cobalamin is as effective as parenteral Advantages of oral supplementation are comfort, ease of administration, and cost
According to the World Health Organization (WHO), validated procedures and controlled laboratory environments are important components of reproducible research workflows
How do proton pump inhibitors (PPIs) affect vitamin B12 absorption
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