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
Because B12 is critical for proper nervous system function, a deficiency can lead to neurological symptoms, such as confusion, poor memory, depression, and difficulty maintaining balance (Serin, 2019)
Vitamin B12 absorption test and oral treatment in 14 children with selective vitamin B12 malabsorption
Good sources are meats like beef, liver, and chicken
The only negative side effects the inoculated group reported were temporary injection site irritation and some mild fatigue
To help you make informed decisions about your health, its important to understand that there may be additional fees beyond the cost of the Vitamin B12 medication itself