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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
How it works: Retatrutide hits three targets instead of two: GIP, GLP-1, and glucagon receptors
PMID 20383582
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Individuals at risk of deficiency, such as vegetarians, vegans, older adults, or those with digestive disorders, may benefit from Vitamin B12 injections
