b12 injected into blood vessel Vitamin Injection Dosage: 7 Facts Adults Should Know Best Vitamin B12 Injection Site:

Be patient and realistic about the expected results, and communicate regularly with your healthcare provider about your progress

Minor side effects may include redness or slight soreness at the injection site, which typically resolves quickly

European Food Safety Authority

[30] Cobalamin analogs prepared by this method include the naturally occurring coenzymes methylcobalamin and cobamamide, and other cobalamins that do not occur naturally, such as vinylcobalamin, carboxymethylcobalamin and cyclohexylcobalamin

Long-lasting effects One injection lasts 4-6 weeks, so patients only need injections every month or two for maintenance