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Harms, M
Studies show that even a little amount of alcohol can decrease vitamin B12 absorption by about 5-6%
Prescription Requirements and Medical Supervision First, you need a doctors prescription for B12 injections
Side effects of peptides can vary but may include allergic reactions, injection site reactions, and other individual-specific effects
Last clinically reviewed: 31 July 2026 Clinical information sources NICE NG239 Vitamin B12 deficiency in over 16s: diagnosis and management NHS Vitamin B12 or folate deficiency anaemia NHS Diagnosis NHS Treatment MHRA Vitamin B12 and cobalt allergy advice This page provides general information about the pharmacy service and does not replace personalised advice from a pharmacist, GP or other healthcare professional
Your healthcare provider will monitor you, especially with the first dose
