Have you read all the information helpfully put on his website by the crazy Russian?
He says that psyllium, high fiber, etc., are an addiction and it's hard to get the system working right without a careful protocol to stop using them as a crutch.
More than you ever wanted to know about poo. Matters have gone better for me since reading his website and his book "Fiber Menace."
Some of what he says about grains, fruits, and vegetables fits in pretty well with Primal ideas.