maximum dosage of b12 injections per day Injection and Frequency: 7 Guidelines for Adults What Is the Effective Dose

[13] Pernicious anemia is the most common cause of clinically evident vitamin B 12 deficiency worldwide

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Pharmacokinetics: Cyanocobalamin is administered intranasally, orally, and parenterally, while hydroxocobalamin is administered only parenterally. Once absorbed, vitamin B12 is highly bound to transcobalamin II, a specific B-globulin carrier protein and is distributed and stored primarily in the liver as coenzyme B12. The bone marrow also stores a significant amount of the absorbed vitamin B12. This vitamin crosses the placenta and is distributed into breast milk. Enterohepatic recirculation conserves systemic stores. The half-life is about 6 days (400 days in the liver). Elimination is primarily through the bile; however, excess cyanocobalamin is excreted unchanged in the urine

Physical activity: Engaging in new or strenuous exercise, particularly without proper warm-up or in hot and humid conditions, can cause muscle spasms