doi: 10.4049/jimmunol.175.11.7728
For instance, while not common, intramuscular injections of vitamin B12 have been reported to cause life-threatening anaphylaxis
It does not manufacture, sell, distribute, prescribe, or compound peptides
Disadvantages of using oral forms: inferior absorption, inferior cellular activity, require high compliance with daily dosing
I also think that my angular cheilitis, burning tongue, hair loss, memory loss, muscle loss, mood swings and anxiety are B12 deficiency symptoms
The step by step is outlined in the link for performing a subcutaneous injection, and we strongly recommend thoroughly reading the instructions, but more importantly, to receive training by a medical professional before you do it yourself in the comfort of your own home