While Hydroxocobalamin Injection (Vitamin B12) is generally considered safe and is well-tolerated by most patients, some individuals may experience side effects
PubMed Hsieh, M.J., Liu, H.T., Wang, C.N., Huang, H.Y., Lin, Y., Ko, Y.S., Wang, J.S., Chang, V.H., & Pang, J.H
A 500 mcg dose from an untested online source delivers an unknown quantity of an unknown substance
Adequate B12 levels are associated with better cognitive function, memory, and concentration
However, the powder must be reconstituted (dissolved back into liquid form) before it can be used in research applications