vitamin b12 100 mcg injection for Cyanocobalamin 1,000 mcg, 25/Box (Rx) — Mountainside Medical 250 mL and 500 mL vials Provides 1 Vitamin B-12 Injectable Solution

It is designed to be administered via injection

Accumulated protocol burden: More frequent administration can improve scheduling precision, but it also creates more opportunities for handling error

Take whatever approach works best for your situation

I am relatively active and I follow a pretty clean Diet which has not changed since including the supplement I will continue to use it to see if its working or not Vitastir has been very good with their follow up and shipping and also customer service on the phone

Unlike vitamin B12 supplements, B complex supplements contain a blend of multiple B vitamins, including vitamin B12