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Injections Work Faster: Injections bypass digestion, delivering B12 directly for rapid deficiency correction

Vitamin B12 deficiency can lead to the development of megaloblastic anemia, demyelination, and other types of neurological damage

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you may transfer once to the next available date if you give more than 72 hours notice

See the 2026 updates section of this guide for the complete breakdown with source citations

Consultation and suitability checks Youll be asked about: Your symptoms and health history Any known deficiencies and relevant blood test results (if you have them) Current medications and supplements Allergies (including metal allergies such as cobalt) Pregnancy/breastfeeding status where relevant B12 injections are not a replacement for medical investigation when symptoms are significant, worsening, or unclear