I use 200mg weekly plus 200mg of B-Complex. The day I inject I feel great but the euphoric feeling tapers off the following day. I do this for a reason though I am vegetarian and do not get enough B12 through this diet.
what kind are you using??? and are you doing the 2 weeks on/2 weeks off or was that dis proven? haven't seen any new info on the subject in a long time...