Dilute in compatible IV fluids and administer as a slow intravenous injection or infusion as per institutional protocol
10.3109/08958378.2012.721097 42 DaiL.BantaG
No human studies have assessed chronic administration effects on brain structure, function, or neurotransmitter systems
The money stays in the account for years, even if you change jobs
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
Many research users find 9 mg the better risk-reward balance