Just to clear up the fiber issue, you can subtract both soluble and insoluble. Soluble fiber is the stuff found in fruits like apples and in non-roufage veggies (avacados etc) and some grains. Your body needs both kinds, and neither have a caloric value. The majority of fiber you eat is insoluble, but the sluble stuff I believe is the one which helps bind triglycerides thus decreasing your "bad" cholesteral. (LDL)

BTW, I think metamucil works fine, it just tastes icky, and you have that nasty cup of gunk if you forget to rinse it out right away!!!