Yes, you really need to eat fiber...here's why.

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https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.medicalnewstoday.com/arti...
https://en.wikipedia.org/wiki/Small_i...
https://www.mayoclinic.org/healthyli...
https://en.wikipedia.org/wiki/Dietary...
http://nautil.us/issue/31/stress/what...
https://healthyeating.sfgate.com/fibe...
https://www.ncbi.nlm.nih.gov/pmc/arti...