I recommend Dr. Robert Gray's 1970's classic "Colon Health Handbook: New Health Through Colon Rejuvenation". Psyllium husks and lots of *good* water will remove intestinal plaque. I know from first hand experience. You must keep at it every day for a month or more, then be amazed and freaked out when pounds of the rubbery stuff comes out. But keep at it, because your energy level will improve a LOT. I would recommend don't fast at the same time though, but do a parasite cleanse with gree walnut hull tincture, cloves and Wormwood . After 6 weeks of this I was running up hills I had so much energy.