Bs need to be taken in balance or you can get nerve damage-see posts here by MrsD in particular. Jarrow makes a B complex called B Right which is pretty good and has the metabolized form of B12 which a lot of PWP need-methylcobalamin.

Bs are critical for brain metabolism so you are wise to be looking at that, so to speak. But read up on them before you start pumping high doses, this forum has lots of posts about B.