Re: Is this too much B12 in a day?
Thanks for the reply. After I posted I went ahead and called the gastro doc yesterday and spoke to the nurse. They gave me an appointment (not until October!) and I am going to push for an endoscopy because I want to know if there is a malabsorption issue. They tested for celiac markers a few years ago which was negative, but I know that may not be a definitive answer.
I read a book about this ("Could it be b12?") and it also seems to point to the need to get to the cause of the deficiency. I think my primary figured why bother, just treat and it will get better. But because I have had so many other gastro issues I feel like I want a better answer.