You are lucky to be given B12 injections. My test back in September 2023 was 113.
I took pills after doing blood test as nurse told me rapid heat beat is often B12 deficiency so I did, then gp asked my if I was taking supplements I said yes he said continue and we will check in a year. I got worse and worse the pills.never made me feeling any better went back to gp teeling all my symptoms, dysphagia, peripheral neuropathy, globus sensation, extreme fatigue, and none made the link and when I went to see again the gp telling again all my symptoms he said to stop as when a patient tells too many symptoms that is when the GP gets confused and anyway my second blood test got 169 so I was not anymore deficient so had enough paid £40 for a B12 injection and felt normal for two days, I did not know I could do it with osteopath. Now skiing it myself and complaint to deputy manager of surgery and going to see a GP again but I had to send 6-7 emails saying they failed in their duty of care. Everyone out there with B12 deficiency careful it looks that many GP are incompetent with B12 deficiency, and I am one example of their incompetence.