They add bulk to the stool, which helps move things out of your colon.
You can get into trouble adding bulk to your body.
Personally, I think all cases just add too much bulk to be very useful.
No amount of weight training will add bulk unless you give your muscles the right fuel.
Engineers say the new building code forced them to add bulk to the foundation structure, though not to change the basic design.
This is related to fiber's ability to add bulk and weight to the diet.
After spending the past month trying to add bulk and muscle, the 6-foot Bush said he weighed 201 pounds.
There are other glaciers that gradually add bulk to it.
In 2007, he decided to add bulk to his 6-foot-5 frame.
You can add dozens of them to your luggage without adding any more weight or bulk.