I remember a heavy-duty high-fiber bread my sister used to make. That's pretty much how she described its effect. There is a vegetable (I think) that long ago was called nature's broom - I googled it & found out it is now a brand name.

I do miss my oatmeal, tho. It may sound strange, but a favorite snack (more like a meal sometimes) was uncooked oatmeal mixed with small cubes of cheese. Now I eat my cheese allowance with my allowance of pecans. Good combo!