Your stomach runs at pH 1.5, acid that strips flesh and kills what lives in rotting meat. A lion is nearer 3.6. You are closer to a vulture than to any ape alive. You have no rumen, no cud, nowhere to park grass for two days while bacteria take it apart. Your colon is short and quiet. A chimp's is a fermentation vat and he chews six hours a day to keep it running. Sixty per cent of your gut is small intestine, where fat and protein go in. Sixty per cent of his is colon, where plants get fermented. Your gut shrank to pay for your brain: sixty per cent fat, a fifth of your energy at rest, the most expensive organ any animal has ever run on leaves and never could. You cannot make B12, no plant makes it either, and running out strips the insulation off your nerves for good. You cannot make creatine in the amounts your muscle and brain want. That comes out of red meat. You convert plant omega-3 to DHA at about one per cent, and DHA is the substance your retina and grey matter are physically built from. You cannot trust beta-carotene for vitamin A. Millions carry a variant that wrecks the conversion and go their whole lives never knowing. You take iron from meat at fifteen to thirty-five per cent through a receptor built for the version wrapped in blood. From spinach, about two. Your teeth have no grinding plates and your jaw will not swing sideways like a cow's. Your eyes face forward. That is what a hunter is given. A prey animal never gets it. Acid built to dissolve carcasses, a gut too short to ferment a plant, and a brain too expensive to run on one. Everything in your biology is screaming at you to eat meat.Fish too! Well, I guess that’s meat. Two recent meals for the family. Cheers :) pic.twitter.com/jgUTqSF6Dz
— Jim Grisanzio (@jimgris) August 15, 2026
And you insist on a kale smoothie and a tablet.
