They're not active ingredients in an FDA-approved drug product, they don't have a USP or National Formulary drug monograph, and they don't appear on FDAs list of bulk drug substances that can be used in compounding
Clinical studies show that B12 injections have no major side effects, though rare cases of sensitivity may occur [20]
This combination is commonly examined in laboratory research environments for its relevance to cellular signaling, tissue-associated biochemical pathways, and peptide-mediated regulatory mechanisms
Vlainic, J., Vukelic, I., Perovic, D., et al
The stomach makes something like this to protect the lining of the gut and fix it when it is damaged