A gorilla has a colon the length of a small motorway. It ferments plant matter for up to 24 hours. It eats all day. Every day. Just to stay alive.
It still can't fully digest cellulose. It extracts maybe 30% of the calories from the fibre it consumes. The rest exits approximately as it entered.
A cow has 4 stomachs. Four. It regurgitates its food, chews it a second time, passes it back through, ferments it with specialised bacteria, neutralises the resulting acid, & extracts nutrition from grass that would be entirely indigestible to any primate on earth.
Then there's you. You have a stomach the size of a fist, a colon that runs for about 5 feet, & a digestive transit time of roughly 24-36 hours. You have almost no capacity for fibre fermentation. You have essentially no cellulase. Your gut is optimised for one thing: dense, calorie-rich, rapidly digestible animal protein.
You are not built to process plants. But here's the beautiful thing. You don't have to. The cow has already done it. It took the grass, ran it through 4 stomachs & a rumen of microorganisms, & produced beef. The beef arrives at the other end pre-converted. Bioavailable. Ready to be consumed.
But somewhere, a nutritionist is telling you to eat more green fibre.
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