US$ 25.57
injection of vitamin b complex with vitamin b12 uses Aspen Vita-Jec Fortified 100 ml Durvet Incs High Level Vitamin B Complex is a concentrated formula available in a 100 mL size B-PLEX 100, VITAMIN B-COMPLEX 100
Description
This could reach the point where natural intake cant make up the difference

I could do with doing it myself

NASO B12 NASAL SPRAY is also used to manage adult patients with vitamin B12 deficiency that occurred due to dietary, drug-induced, and/or malabsorption factors

Kienesberger, P