High fiber foods, such as these Fiber One bars, are known to cause excess gas and other intestinal issues. The gas you and others may experience from eating these bars could be due to the high amounts of fiber in each bar. You can read the side of the box, via that Amazon link, to see how much fiber is in each bar (35% DV).
In addition, chicory root is a natural source of inulin, which is also associated with gas/bloating for people.
So not only is chicory root extract a good source of dietary fiber, which is itself associated with digestive side-effects like gas/bloating, it is also a natural source of inulin which is also associated with gas/bloating.
- Chicory root extract, like whole grains and beans, is a source of dietary fiber
- Chicory root is a natural source of inulin, like garlic and bananas
- Sudden increases in fiber is a source of digestive problems
- Sudden increases in inulin can be a source of gas/bloating
- Reduce negative side effects of dietary fiber and/or inulin-rich foods by increasing them slowly in your diet while your body adjusts
- Experts advise drinking extra water to help the fiber pass through the system
SF Gate writes:
Some high-fiber foods may lead to uncomfortable bloating and gas. This
is a natural side effect as the bacteria in your intestinal tract work
to help fiber pass through. Reduce your chances of having gas by
limiting certain types of foods or taking an over-the-counter
supplement to prevent gas.
Consuming too much fiber at one meal or suddenly increasing your fiber
intake may increase uncomfortable gas and bloating in your gut. Reduce
this uncomfortable effect by slowly increasing your fiber intake over
a period of days or weeks. This gives the natural digestive flora in
your gut ample time to adjust to the increase in fiber
Additionally, Everyday Health (EH) notes:
Unfortunately, when you start to include more fiber-rich foods in your
diet, you may start to notice an undesirable side effect: excessive
gas. Flatulence and bloating can result, which can be embarrassing and
uncomfortable, to say the least.
Livestrong also notes:
If, however, you eat more fiber than you are accustomed to, it can
cause gas and bloating.... Eating a lot of fiber in one sitting, even
if you normally consume a fair amount of fiber, can also cause gas. (emphasis added)
The University of Maryland Medical Center notes:
Fiber can cause gas and bloating.... Add fiber gradually over a period of a few weeks to avoid stomach distress. Water helps fiber pass through the digestive system. Drink plenty of fluids (about 8 glasses of water or noncaloric fluid a day).
The Harvard School of Public Health notes:
Experts recommend increasing fiber intake gradually rather than
suddenly, and because fiber absorbs water, beverage intake should be
increased as fiber intake increases.
** Regarding Chicory **
Specifically for chicory root, Wikipedia states that chicory root is a natural source of inulin, which is type of carbohydrate. Extracted chicory root is commonly used by food manufacturers in such things as breakfast bars because of it's smooth texture as a carbohydrate fiber - it's a way to add fiber without changing the taste or texture of the food. Inulin can also be found naturally in bananas, onions, and garlic.
Dr. Weil on Chicory and Fiber:
The only problem with inulin may be that it doesn't have the texture or taste of fiber. This can make it easy to consume too much, bringing on the same kind of digestive problems caused by an excess of any fiber: gas/bloating, nausea, flatulence, stomach cramping, diarrhea, constipation and digestive "rumbling."
As Wikipedia states
Inulins are a group of naturally occurring polysaccharides produced by
many types of plants, industrially most often extracted from
chicory.... Inulin-containing foods can be rather gassy, in particular
for those unaccustomed to inulin, and these foods should be consumed
in moderation at first...