This means its illegal and extremely unsafe to buy it from any website that doesnt ask for a valid prescription from a qualified prescriber
High dose oral cobalamin may be a suitable alternative in selective cases, where intramuscular injections are not tolerated and compliance is not a problem
This sterile, aqueous solution is supplied in a 10ML vial and is intended strictly for use in controlled, non-clinical research environments
However, seek immediate medical attention if you notice any symptoms such as skin rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, breathing difficulty, etc
Verdict: Go (Cautious) High demand, but requires strict third-party testing to build trust
no large-scale or injection-route efficacy trials have been completed [3]