the two fibers

Nearly forgot this, don't foget there are two fibers.

both are necessary. and both are helpful especially when consumed together.


Seacoastonline.com: Adding more fiber to your diet has long-term health benefits

# Insoluble relieves constipation by pushing waste material rapidly through your system. The result is you feel better. It's found in the indigestible parts of plants that we eat — grain husks, skins of fruits and vegetables, the brown in brown rice, outsides of beans, peas and berries. It's also called roughage or bulk.
# Soluble fiber often gets forgotten. But it's the one that lowers cholesterol and reduces the risk of heart disease and is associated with reversing obesity. Soluble fiber turns up generally in the pulp of fruits, vegetables, grains and beans. Rather than using stomach acids and enzymes to digest soluble fiber, your body uses bacteria, which digest it slowly. The slow digestive process keeps food in your stomach longer and deters your hunger longer — especially if you drink a lot of water on top of it.