I bet it would have come out really funky!

OK, it's just that some tests have been done on people with pernicious anemia lacking intrinsic factor, and it seems there is something called "passive absorbtion". More here and here.

I would normally not push this, it's just that I have done both injections and oral methylcobalamin. While the injections worked (it was hydroxocobalamin BTW, not cyanocobalamin), I was always dependent on "others" to get the shot. A friend who had pernicious anemia could set her own - as she is a registered nurse - and she could feel exactly when she needed one, which doesn't always follow some tight schedule. I guess you felt exactly the same.

I was highly skeptical of oral, especially as I had messed up my stomach with antacids and alcohol for years, but to my surprise, taking 5000mcg on an empty stomach every morning, it worked perfectly, safely, and cheaply(!).

After falling back to the 300 range within 2 months after my last shot, I managed to go up to 1296 in 3 months with just the oral methylcobalamin.

Worth a shot? (pun not intended )