It seems that although my thyroid levels are now looking quite good, my B12 level is rather low and from what I read on here, it could be due to taking Lanzoprazole prohibiting the absorption of B12. My pharmacist concurred with that view too. I had a camera examination some years ago which concluded that I do have a Hiatus Hernia. Certainly when I stop the Lanzoprazole (or sometimes I change to Omoprazole when the former stops working) the heartburn is excruciating. I'm assuming that dosing orally with B12 tablets won't then be the answer. Does this mean that I need to persuade the GP to offer me regular B12 injections? I also saw the video posted on here about the Oxford trial that concluded a link between low B12 and Alzheimers. I'm 64 so that really worried me.