Can too much fiber in the diet of a 17-month-old cause loose bowels?

What a great problem to have! The loose stools may just be a temporary sign that someone who was not getting enough fiber earlier, is now suddenly getting an appropriate amount.

In it's 2006 report Food Marketing to Children and Youth, the Institute of Medicine warned that, overall, American children are not meeting basic nutritional goals. In particular, fiber intake in most kids is well below recommendations -- sufficiently low to warrant concern. It's one of the reasons for the childhood obesity and diabetes epidemics, and a host of other health problems.

Is it possible to get too much fiber? How much do kids need? And what are the best ways to get it? Let's start by looking at the upper limits…

For many nutrients (such as vitamin A) safe upper limits have been set, because too high a level can cause more harm than good. For fiber, however, no upper limit has been set because, as part of an overall healthy diet, high levels of fiber found naturally in foods don't cause health problems in healthy kids.

Nevertheless, if fiber levels increase quickly, or jump up and down from day to day, this can cause loose bowels in any of us. How much fiber it takes to do this varies from person to person and over time. When people suddenly switch to a veggie diet , for instance, they often have loose stools until their bodies have a chance to adjust.

The good news is that usually, over about two weeks, the system will adjust to accommodate the higher fiber levels (from fiber found naturally in foods - synthetic, added, or enhanced fiber can be another story). If the loose stools are not bothering him, making a mess, or causing a rash , there is no need to cut back - getting enough fiber is well worth the wait. On the other hand,, you might want to cut back the fiber a bit and then try gradually reintroducing it a little more every few days.

How much do kids need? The Adequate Intake (AI) of fiber is 19 grams a day for kids 1 to 3 years old. The AI increases to 25 grams a day from 4 to 8 years old. After age 8, boys usually need more fiber each day than girls do. Boys 9 to 13 do best with at least 31 grams a day, increasing to 38 grams a day at age 14. Girls' needs increase to 26 grams a day at age 9, and don't increase again until they are pregnant or nursing. Sadly, most kids get a fraction of this amount.

Dietary fiber occurs naturally in whole grains (including oats, rice, and wheat, among many other wonderful grains). Unfortunately, in the process of refining these grains into over-processed flours, we have too often stripped them of their fiber and other key nutrients. Part of what makes a food a junk food is removing the fiber.

Kids should get at least 3 servings of whole grains daily for optimal health.