Thank you. I checked out the links and the authors seem to know what they're talking about. I have a lot of homework to do. I need to find out if the long-lived people of Sardinia and Okinawa have very low fiber diets as the GutSense site claimed. If they do, then it seems likely that only small amounts of fiber may be best. Whatever their average level of fiber is what apparently is generally best. I also need to find out if breast-fed infants have no fiber in their diets and, if so, why they can get away without fiber. And things like that. If anyone has answers already, please let me know.

Both GutSense and one of your links agree that some soluble fiber is needed to feed our microflora. So the question is how much fiber and what kinds are ideal. I had read back in the 80s I think that fiber in fruits is good against cancer, but fiber in grains is not. The http://medcapsules.com site seems very informative. I'm surprised that it finds so much falsehood in Dr. Mercola's articles. Looks like Mercola is wrong about soy, fructose and mercury fillings, e.g. And it says Mercola is on the board of directors of the W.A.Price Foundation, which is funded by the meat and dairy industries.