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The main concern over a vitamin B12 deficiency is that it can lead to anemia, a condition where there are fewer healthy red blood cells

Can the dosage of B12 injections be adjusted based on clinical response

No trial reported on clinical signs and symptoms of vitamin B 12 deficiency, health-related quality of life, or acceptability of the treatment scheme Orally taken vitamin B 12 showed lower treatment-associated costs than intramuscular vitamin B 12 in one trial

Frequency depends on individual needs , but many opt for weekly or monthly treatments

PubMed Ng, F.M., Sun, J., Sharma, L., Libinaki, R., Jiang, W.J., & Gianello, R

Unlike supplements taken by mouth, injections bypass the digestive system, ensuring full absorption