i have been going to the doctor for my mental symptoms caused by pois and in several tests my Serum AMMONIA have been came out very high even toxic in some instances this explains all my mental problems and lifestyle changes specific to treatment have helped me out quite a bit if any of you have done this test or have similar results please share your experience and if you have never tested for serum AMMONIA please get tested its not very expensive usually very cheap in most of the places in asia. again this is not medical advice please ask your doctor while doing anything regarding to your health i just want to know if this is a common factor in POSI.