b12 im injection bottle Cyanocobalamin (B12) 1000 mcg/mL, Multiple Dose Vial 1 mL, 25/Tray 12 deficiency in animals Hydroxocobalamin Injection: Vitamin B12 for

Rotate the site every time, because injecting the same spot repeatedly can cause a fatty lump (lipohypertrophy) that slows absorption, a point the NHS is clear about when it advises you to rotate sites daily

Throw away unused or expired B-Vitamins, but do not flush down a toilet or pour down a drain unless you are told by a trained professional that it is okay to do so

While you could try to do some blood testing etc etc to see if maybe you could stand to benefit, by the time you spend the money to do that, you might as well just do a trial for the same or less cost and definitely less time and hassle

I will discuss your medical history and expectations before any treatment