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Factors Affecting the Duration of B12 Injection Benefits Several factors can influence how long the benefits of a vitamin B12 injection last

The nasal cavity has a rich blood supply

This product is intended strictly for laboratory, analytical, and non-clinical research purposes only

Update: Our readers suffer from pernicious anemia and need lifelong B12 shots, so we partnered up with a lab in the UK to offer vials of medical-grade methylcobalamin for $129 or less, which can bring the cost per shot down to $3.10-$3.90

For a comprehensive overview of injection equipment and technique, the peptide injection pen guide covers device options that simplify the dosing process while minimizing waste