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Why Low Vitamin B12 Levels Are Common in Older Adults To understand how low vitamin B12 levels happen in aging adults, its good to start by learning how the body usually obtains and processes this vitamin

However, some believe that the demand for the shots is increasing, as is the demand for health and wellness clinics and even naturopaths to give these shots to patients and walk-ins without a prior prescription

Patients with existing medical conditions should consult a healthcare provider before considering use

10.1089/acm.2006.12.881 Summary Keywords vitamin B12, efficacy, bioavailability, therapeutic approaches, meta-analysis, cobalamin Citation Mazur M, Ndokaj A, Salerno C, Vallone J, Ardan R, Bietolini S, Carrouel F, Wilk A, Sarig R, Ottolenghi L and Bourgeois D (2025) Efficacy of sublingual and oral vitamin B12 versus intramuscular administration: insights from a systematic review and meta-analysis