I just finished to watch the movie about b12, and the main question I have it's basically still the same. All the symptoms I have looks like could be connected with B12 deficiency, but also on the movie, even for extreme cases, they were talking about numbness and tingling only for limited part of the body or limited extension of time. In my case pins and needles are more widespread along the body, and I think in the last 4 months It wasn't even a single moment that I wasn't having it, in the best case some numbness in left hand and face in the worst strong feelings or burning in a big part of the body.