[photo from http://www.student.foodscience.org]
The fruits-and-veggies, peas, beans, and grain you eat today might save your grandchildren from a fecal transplant.
One of the main roles of fibre is to support the “good” bacteria living in our colon. These bacteria are working to keep YOU alive. Now try explaining that to your kids, or where absolutely necessary, sneak those veggies in!
Check out THIS link for some food science.