Thanks for the replies. Yes my T.I. was completely removed along with some small bowel, and colon. The surgery was done long ago. I have tried the sublingual B12 as well, and it does nothing for me.

I also take Humira, and believe that it interferes with B12, Iron, and Magnesium. I have to supplement with iron bisglycinate daily and magnesium chloride several times a day or else I don’t feel right.

I have some questions about the other forms of B12.

I found a few places on the internet for methylcobalamin injections. Any leads as far as where to purchase?

What is an equivalent dose compared to cyanocobalamin or conversion.
Does 1ml of methyl = 1ml cyan?