Soluble fiber is exactly what the word means. It is dissolved in fluid and insoluble does not.
Potatos, rice, beans, corn, oatmeal and oat bran absorb as well as psyllium seed husk absorb water are bulk forming fibers---also most fruit but not the peeling.
Nuts, wheat bran, green beans, bananas and others do not absorb or dissolve in water.
We need both types for our intestines to work.
[This message has been edited by Harry (edited 02-14-2003).]