Hi, After long research on the web, I still cannot conclude if I, on a vegan diet, need to supplement with choline, creatine, taurine and carnitine supplements. I do not have any sources in my diet that are high in these, and according to some research, I just need B12 if I am not a meat eater. Yes, it mentions that the body can ¨synthesize these on it´s own¨ however does mention that these levels are lower in vegans, it does not mention that these are too low and/or those vegans with low levels would have similar symptoms as myself (IBS,fatigue,muscle/bone issues). I have ruled out everything else, I take sufficient proteines,oil, multivitamin,B12,calcium,magnesium etc. Thanks for your help!