is vitamin b12 an im injection Cyanocobalamin – 1000 mcg/mL Best Vitamin B12 Injection Site:
Description
This vitamin supplement is widely used to address vitamin B12 deficiencies and support neurological health, providing essential nutrients under medical supervision

E.MarkidesH.RotherhamM.BayoussefZ.et al (2016)

Pyridoxine (B) in high doses is known to interact with certain drugs: it can reduce the therapeutic efficacy of levodopa by increasing peripheral conversion of levodopa to dopamine (vitamin B speeds up decarboxylation)

Even before these new regulations, B12 injection kits were sold for $350 or more

H., Yao T