leaky gut

I have a leaky gut but cannot get rid of it i heard the best way was to just get rid of all the poisons out of your body by using laxatives. I tried a one day fast and had lots of vitaminc and am feeling very intoxinated do you think this could be a sign of toxins in my blood being released. anyway i no longer have parasites but am not feeling better as food affects my gut is the best way just to get rid of toxins via the bowel as my liver is very overloaded and i feel poisoned all the time. any advice please