how long does it take b12 injections to take effect Vitamin Injection Side Effects and Safety How Long Does It Take

According to a study published in PubMed Central (NIH), IV administration of vitamin B12 provides a faster increase in B12 levels compared to oral supplementation, making it a potentially better option for patients with severe deficiency

This is why autoimmune gastritis B12 deficiency deserves more attention

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Expected Timeline for Symptom Improvement It may take a few weeks to a few months to see symptom improvements with oral B12

As soon as the necessary dose of the drug is drawn into the syringe, it should be disconnected from the needle located in the vial