I addressed the claims made by the the author in this post:
http://curezone.org/forums/fm.asp?i=1461458#i
I also warn against using wheat bran in some cases such as diverticulitis. It would be a good idea to eliminate wheat fiber, and maybe wheat altogether just in case this is a gluten intolerance.:
http://curezone.org/forums/fm.asp?i=1461373#i
The same also applies to psyllium, which can damage the intestines and cause bloating.
Probiotics and prebiotics would be a good idea. For probiotics I prefer kefir or other liver culture foods like sauerkraut or miso. For prebiotics soft fibers are best, especially if you do have diverticulitis or some other intestinal inflammation. My first choices are rice bran or oat bran since they are also very nutritional. Gums such as konjac, guar and xanthan gums are also great for stimulating growth of the intestinal flora. Fruits and vegetables would also be good for fiber, but avoid things with tiny seeds such as strawberries, which can aggravate diverticulitis.
Carbohydrates do not need to be avoided, they are not evil. But simple and refined carbohydrates should be limited.
Same for meats. They do not need to be eliminated but should be limited since animal proteins provide inflammatory arachidonic acid.
A mixture of licorice root and yucca root is great for helping to keep down intestinal inflammation and to clean out the diverticuli in diverticulitis.
I'll look into kefir (I believe that's "Greek yogurt"?) and sources of oat bran and rice bran.
I don't think they are the same thing, but even yogurt will work if you are sure the cultures are active. With all the antibiotics you have used this could be what is causing a lot of your current symptoms.
I can't tolerate lots of fiber, makes me uncomfortable ("full" feeling in the rectum and sometimes gas). I stopped eating whole wheat pasta and breads because of this, just as bad as Metamucil. I don't need help to have a normal BM.
Fiber is for more than just helping peristalsis. Fiber is also required to feed the flora and to help with biding toxins and bile formation. Not all fibers are the same though, and some are more apt to cause bloating. For example, psyllium is hard on the intestines and tends to cause bloating. I prefer soft fibers such as rice or oat bran, which are also nutritious.