Hello,i am vitamin b12 deficient and from past 1 and 1/2 year i am taking b12 capsule but still not felling well enough. Symptoms like problem in nerves ,excessive sweating,nervousness,shakeness in hand,heaviness in head. Their is bit of improvement during this but symptoms come back. Right now i am taking zevit capsule on my doctor advise. Wants to know am i able to recover completely or this will persist with me lifelong.