Fiber

Fiber is not essential or necessary.

In fact it makes bowel movements/GI symptoms worse. This idea that fiber was good for the body was born out of religious zealots from the Seventh-Day Adventist church. The most notable being one John Harvey Kellogg, yes, the cereal Kellogg. Their belief was that a plant-based/vegan diet cured impure thoughts and lust, which drove masturbation, which would lead to blindness, decay, heart disease, cancer, insanity, and early death. But, our digestive systems were never meant to handle so much indigestible plant material. Slowly, as religious reasons fell out of favor, it evolved into us all being told that we need to eat fiber to increase the bulk of the stool to prevent constipation, but does that really make sense when considering that the goal is to pass something through a small hole at the end of the tunnel? Fiber in fact leads to more constipation and bloating, as it is indigestible, most of it ends up in the colon, indeed feeding the bugs in our gut where they produce a lot of gas. And since, it really does give the stool more bulk, it becomes even harder to pass through the digestive tract. All things considered, fiber serves to make digestion a much more uncomfortable experience than it has to be.

From Stopping or reducing dietary fiber intake reduces constipation and its associated symptoms

It’s pretty clear that eliminating fiber from the diet would be extremely beneficial in respect to reducing GI symptoms.

Watch to 7:08
watch to 16:08

TL;DR

Fiber is not essential to our diet in any way. The concept that it is essential is an ideology that has been pushed by a religious sect for decades. You may decide to still include plants and fiber in your diet, but by no means is it necessary for health. It in fact tends to worsen gastrointestinal issues rather than improving them.

Other resources:

Paul Saladino, MD on Everything You Thought You Knew About Food Might Be Wrong

Carnivory – a cure or a risk? — Diet Doctor Podcast with Amber O’Hearn

How does Smooth Yogurt Have Added Fibre? | Food Unwrapped

Fun history:

Papers:

Ho, K. S., Tan, C. Y., Mohd Daud, M. A., & Seow-Choen, F. (2012). Stopping or reducing dietary fiber intake reduces constipation and its associated symptoms. World journal of gastroenterology18(33), 4593–4596. https://doi.org/10.3748/wjg.v18.i33.4593

Foster, M., Karra, M., Picone, T., Chu, A., Hancock, D. P., Petocz, P., & Samman, S. (2012). Dietary fiber intake increases the risk of zinc deficiency in healthy and diabetic women. Biological trace element research149(2), 135–142. https://doi.org/10.1007/s12011-012-9408-7

Gaskins, A. J., Mumford, S. L., Zhang, C., Wactawski-Wende, J., Hovey, K. M., Whitcomb, B. W., Howards, P. P., Perkins, N. J., Yeung, E., Schisterman, E. F., & BioCycle Study Group (2009). Effect of daily fiber intake on reproductive function: the BioCycle Study. The American journal of clinical nutrition90(4), 1061–1069. https://doi.org/10.3945/ajcn.2009.27990

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