Thanks boron for your reply, I take medicines to control high blood pressure(partialy, due to streesful life) and diabetes(sugar in blood). Now, I do not take sugar ,but my brain needs sugar if work actively. I am telling this with my experience.
Any way, I was checked with ultrasound of abdomen,blood tests, colonscorpy,test of stool by advise of particular specialists, but they found nothing. three months ago, they found increased ALT in blood, they checked liver also, they said that it is ok.