I am +/- for CBS C699T, and everything I have read says to avoid B6, but on the heartfixer website they say P5P form of B6 wont be as much of a problem. I have also read on this forum (annoyingly cant find it now) someone actually recommending P5P form of B6 for CBS folk - saying its actually beneficial. Is this correct? Can anyone provide some evidence or further reading saying P5P is good for CBS + people.