Do you know what your number is? My reading was 119 with 400 being the low end of acceptable. I took one shot per month 100 units liquid plus one Methylated B-12 pill per day. it took about 4 or 5 monthe to get my number over 900. If you ate poorly while addicted there may be other nutritional considerations. I believe that the b-12 is water soluble and so not much danger of getting poisoned. However I believe that it is a slow process that takes patience to get your blood into the right condition for healing the nerves. If you lurk and read you know that taking care of yourself is paramount. Good Luck, Ken in Texas. P.S. If your b-12 is low enough your Dr. can RX the liquid shots.