Back of the upper arm: The fleshy area on the back of the arm between the shoulder and elbow
Rarely, hypersensitivity reactions can occur, for instance, urticaria (hives) or other allergic-type reactions have been reported in isolated cases
If you dont want to get b12 shots then you can try eating foods rich in vitamin b such as dairy products
I've seen the injectable B12 online, I believe it's also prescription in the US, is the online stuff any good
Wisconsin medical journal , 93(5), 203205
The barrel of your syringe will have the measurements clearly indicated, so all youll have to do is line up the top black line of the syringe plunger with the 1ml mark