Forums Ask for advice B12 deficiency Reply To: B12 deficiency March 20, 2018 at 1:51 pm #371 ritchy 7 Posts I think you can take B12 sub lingually if injections really are a no go. I may have dreamed that though. I am a new woman since just taking over the counter iron, magnesium and lots of B vits, no more fatigue and brain fog here.