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Helps constipation.

Protip: Excess consumtion of metamucil fiber will lead to explosive diarrhea before long.
I hadent taken a shit in 3 days so I ate 4 metamucil fiber wafers...all seemed well untill I spent the night sitting on the toilet with lava poop.
by PooMasterFlash October 12, 2008
Helps you poop when you're constipated.
"I ate the skin off a potato because it has fiber and I'm constipated"
by Awan Awfuqya June 21, 2006