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
That is one reason FDA staff and several committee members resisted treating patient demand or clinician experience as a substitute for controlled evidence
GLP-1 pharma giants Eli Lilly and Novo Nordisk slapped some of them with lawsuits
Post-treatment elevation is interpreted differently from elevation without a clear exposure history