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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
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Availability of data and materials Data described in the manuscript will be available upon request and approval by the UK Biobank ( References Oppenheimer GM, Benrubi ID
Marketing glutathione specifically for skin lightening or whitening is illegal in the United States under FDA cosmetic and drug regulations
Gut 34 , 354357 (1993)
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