I just started taking sublingual vitamin B12 from the health food shop. It's not expensive - about £10 for 100 tablets, enough for 3 months.
No tests from doctors. No interest, treated with nothing but antidepressants and contempt.
I did check first that it's not something that would end up causing problems in "overdose", and decided just to try it.
Within 30 minutes of taking my first one, a sort of strange non-painful agony,
the feeling of my brain being about to explode
from the effort of taking in information if somebody was talking to me,
that had been constant for 3 years
just lifted.
It was a miracle for me. I've been taking it for 7 years.
It isn't for everybody!
Not long ago, I started forgetting to take it. My tongue went black and hairy, I started getting oral thrush and sores in my mouth that wouldn't heal.
Not only that, but my brain and body were going slowly further and further downhill.
As soon as I started taking it again, my mouth cleared up and healed, my brain and body are starting to come back a bit.