Hello -

New to this forum! Question-just starting testing for neuro symtoms (nerve testing next week followed by an mri). Symptoms include: numb, tingling feet, muscle twitching moving up from ankles, calves, thighs, eyelid, and now numbness to tongue and lips. Dr question if I had b12 test done, and I said yes was normal (in fall 2010-testing done by that Dr). Result was low 600's. Did not think to tell Dr that at the time had been taking for several years B12 supplements and multi B. How long would you suggest after stopping taking supplements to have b12 test taken again?

Thank you!