Fred Kummerow told America in 1957 that the fat in margarine was turning up in the arteries of the dead. The government acted on it in 2015. He was 100. He was a biochemist at the University of Illinois, and what he had done was simple and slightly grim. He got hold of tissue from people who had died of heart disease and looked at what their arteries were made of. They were full of trans fats, a kind of fat that barely exists in nature and came, in 1957, from one place: the hydrogenated vegetable shortening and margarine the country had just been told to eat in place of butter. He published it in Science. He was 43. What followed was a career spent being ignored by experts. The oil industry had friends on every committee. His funding grew thin. In 1968 he talked a panel of the American Heart Association into warning about trans fats, and the warning was pulped and reprinted without it after the shortening makers saw a draft. Kummerow kept working. He kept his laboratory into his nineties. And he kept eating, quite deliberately and in front of journalists, the diet he had been told would kill him. Eggs cooked in butter. Whole milk. Red meat. He had looked inside the arteries himself and he had not found breakfast in there. In 2009, aged 94, he filed a formal petition asking the Food and Drug Administration to ban artificial trans fats. The law gave the agency 180 days to answer. Four years later it had not, so in 2013, at 98, he sued the United States government. Three months after that the FDA announced it agreed with him. The ban was confirmed in 2015. The gap between his paper and the decision was 58 years, which is longer than most of the people who ate the margarine got. He died in 2017, at 102. And he spent those last years on a second warning, which has been received exactly as the first one was. The problem, he said, was never the cholesterol in the egg. It is the vegetable oil in the fryer, heated and reheated until it oxidises, and then eaten. On the record so far, that one is due to be acted upon in about 2070.

The first time ordinary English people could afford to eat meat, Parliament passed a law to stop them. In 1256 the harvest workers on one Norfolk manor were fed a diet that was 4% meat by value. Most of the rest was bread. The deer belonged to the king, the rabbits to the lord, and the peasant to the pottage. Then the Black Death killed half the country. Suddenly there were more fields than hands. The survivors could name their price, and they named it in beef. 1351: wages are frozen by law at their level before the plague. Asking for more is a crime, and every village is ordered to build a set of stocks for those who do. 1361: a labourer who leaves his lord for better pay is to be branded on the forehead with an F, for falsehood. 1363: a statute lays down what a servant may eat. Meat or fish once a day and no more. It held for 30 years. In June 1381 the ploughmen marched on London, took the Tower, and beheaded the Archbishop of Canterbury. Wat Tyler put their demands to the king in person. An end to serfdom. And every park, warren, river and wood in England thrown open, so that a poor man might take game the same as a rich one. At St Albans the rebels walked into the abbot's private warren, caught a rabbit, and tied it to the town pillory, as notice that the game was now theirs. Tyler was stabbed at the meeting. The king, who was 14, took back every promise. Villeins you are, he told them, and villeins you shall remain. 9 years later came the reply to the rabbit. 1390: nobody worth under 40 shillings a year may keep a hunting dog, a ferret or a net, on pain of a year in prison. Parliament wrote its reasoning into the preamble. Labourers had been seen out hunting on holy days like gentlemen, and were using the hunts as cover to meet and plot another rising. There were plenty of deer. What could not be tolerated was a ploughman with a haunch of venison, because a man who can feed himself can afford to say no. The laws failed. Hands were too scarce, and by 1424 that same Norfolk manor was feeding its harvesters 28% meat. The instinct behind the laws has never failed once. Whenever the poor get their hands on meat, somebody important discovers a reason they should not have it. The king's pleasure. The social order. Their cholesterol. The climate. The reason is replaced every century. The people giving it have never once missed a steak.

Every three years in medieval England, the king's men went from cottage to cottage cutting the toes off the peasants' dogs. It was called lawing. The dog's forefoot went on a block of wood, a chisel was set across three claws, and they came off with one blow of a mallet. The Charter of the Forest, 1217, records the correct method: three claws of the forefoot, but not the ball. A dog with three toes missing cannot run down a deer. That was the entire purpose. A third of England was royal forest, every animal in it belonged to the king, and a poor man's dog was the one piece of hunting equipment he could not be stopped from owning. So they left him the dog and took its feet. If the inspectors found yours intact, the fine was three shillings, about a month's wages. Before 1217 they simply took your ox. No law ever told that man he could not eat meat. The law took his bow, his dog's toes and his right to the wood, then left him entirely free to work out the rest for himself. He worked it out. He ate oats and beans, and he raised children who ate oats and beans. That is how it is always done. Meat is never banned for the poor. It just becomes, by one sensible regulation after another, impossible to get. Count the sensible regulations being drafted for your dinner this year.

Most people cannot read a steak, which is why they keep buying the wrong one. Read it in three places, and read it in this order. The cap. That thick band of pale fat curving round the outside edge, running the full length of this one. Buy it for that alone. As it renders it bastes the meat from the outside in, and if the pan is hot enough it crisps into something close to crackling. It is also the first thing a nervous shopper asks the butcher to cut away, which is how a good steak gets ruined before it leaves the counter. The seams. Those wide white rivers running through the middle, dividing one muscle from the next. That is the spinalis separating from the eye, and the spinalis is the finest piece of beef on the animal. Cut it away, eat it on its own, and you will understand why butchers quietly keep that bit for themselves. The marbling. The fine web threaded all the way through the red, like frost on a window in January. That fat sits inside the muscle, so it cannot be trimmed off and it cannot leak away. It melts as the steak cooks, from within, and it is the entire reason a ribeye is juicy while a fillet is merely polite. Flavour lives in the fat. Not in the protein, not in the sear. Almost every aroma compound your nose picks up when beef hits a hot pan comes out of the lipid, which is precisely why a lean cut tastes of very little and needs a sauce sent in to rescue it. Fat is where the vitamins are. A, D, E and K2 will not dissolve in water and they do not travel in lean muscle. Trim the fat and the delivery system goes in the bin with it. Fat is where the fullness comes from. It is what shuts appetite down and keeps it down, which is why a lean meal leaves you rummaging two hours later and a fatty one does not. Fat is what keeps everything moving. It carries the bile, it lines the tract, it is the reason a fatty meal goes through you like it was designed to. Fat is the energy. Nine calories a gram against four, burning clean, no spike, no crash, no dip at three in the afternoon. Fat is the fabric. Every cell membrane you own, the sheath on every nerve, sixty per cent of your brain by dry weight. This one has all three markers. Cap on, seams open, web running edge to edge. Most of what sits in a supermarket chiller has a shaved cap, thin seams and almost nothing running through the middle. Even a ribeye this good comes in at about 1.2 grams of fat to 1 of protein, which is barely over the line. So finish it in butter anyway. Fifty grams in the pan at the end, off the heat, spooned over until the whole thing is glossy. Then eat it slowly, because you will not want anything else for the rest of the day, and that is the point.

Look at the human body as a weapon. It is embarrassing. No claws. Fingernails that lose a fight with cardboard. No fangs. Flat little teeth that struggle with a tough steak. No armour. Skin a bramble can open. No fur. Cold kills us in a night. No speed. A squirrel outruns us. A toddler loses to a goose. No strength. A chimp half our weight could take us apart. No venom. No shell. No horns. No wings. Pound for pound, we are the softest large animal in the field. And we hunted every one of them to the edge. Because everything went into one organ instead. The human brain. Twenty percent of your energy, run by a body that skipped every other upgrade. And it is built from fat and animal food. DHA from fish and meat. B12 found in no plant alive. Cholesterol, the scaffolding of every brain cell you own. The ape that started eating meat grew the brain. The brain built the spear. The spear ended the argument with every animal that had the claws and the fangs and the speed. A soft, slow, clawless creature became the apex predator of the entire planet, on the strength of one organ made of the exact food we are now told to cut out for our health. We ate our way to the top of the food chain. Now they want us to eat our way back down.

1918: they sold radioactive water as a health tonic. It was radium, and it dissolved men's jaws. 1898: they sold heroin as a children's cough syrup. It was heroin. 1863: they sold cocaine wine as a daily pick-me-up. Popes and presidents put their names to it. 1946: they sold cigarettes on a doctor's recommendation. Whole campaigns ran on which brand physicians preferred. 1960s: they sold margarine as the heart-healthy fat. It was loaded with the trans fat that actually stops hearts. Every one of these came with an expert's blessing and total confidence. The people telling you today which fat to fear are the institutional descendants of the ones who put radium in your water and a doctor's face on a cigarette packet. "The experts recommend it" has a body count going back a century.

>be Bryan Johnson >decide death is optional if you throw enough money at it >two million dollars a year, thirty doctors on call >eat 1,977 calories of beige vegan paste a day, the one diet humans were never built to run on >pick it, of all things, as your route to living forever >chase every meal with a hundred-plus supplements to plug the holes the paste leaves >hide from the sun under a hat and a UV umbrella, caked in mineral sunscreen >the star that grew every living thing on earth, dodged like a mugger >treat red meat like it's radioactive >iron sits on the floor for years, however many pills you throw down >"I may have the best biomarkers ever recorded" >thirty doctors, and not one can say why the iron won't hold >finally biopsy the stomach >your own immune system has been turning on it for years >autoimmune gastritis, the exact tissue that pulls in iron and B12, breaking itself down >go on X to announce "my stomach is eating itself" >the nutrients you can no longer hold are the ones a plate of red meat gives away for free >mfw you dodged the sun, refused the meat, lived on pills, and your body still chose to eat itself

Pork takes a kicking in carnivore circles. It isn't beef, it carries PUFAs, and it drags two thousand years of religious taboo behind it. So let's be fair about what it actually is. Pork is genuinely nutrient-dense, in the old sense of the word rather than the one printed on bags of goji berries. It's the richest common source of thiamine there is, well ahead of beef or lamb, the very vitamin whose absence gave rice-eating populations beriberi. Then selenium, zinc, choline, carnosine, complete protein and B vitamins across the board. Now the PUFA question, straight. Pork fat does carry more linoleic acid than beef, because a pig has a simple stomach and can't convert dietary fat into saturated fat the way a cow's rumen can. What the pig eats, the pig becomes. Feed it grain and soy and its fat shows it. But look at what you've already done. Cut seed oils, soy and nuts and you've stripped out nearly all the linoleic acid in a normal diet. Against that, the trace in your pork is a rounding error. The real problem was always the bottle on the counter, and the bottle is gone. And remember who built their kitchens on pork. China, Vietnam, Korea, Thailand. Belly, shoulder, trotters, offal. Those were not the populations dying of metabolic disease. That arrived later, riding in on refined carbs and vegetable oil. The pig had nothing to do with it. The old religious ban belongs to another world. The carnivore one is aesthetic, recent, and entirely optional. Eat the belly. Render the lard. Cook the rest of the pig in it. Beef is exceptional, and pork sits right beside it. Both animal, both complete, both doing what no bag of seeds ever could.

Want to know the single most efficient use of British land? Forget almonds. The climate here would take one look at an almond tree and file a formal complaint. Forget avocados. Be serious. Forget quinoa. We can grow it, technically, in the way you can technically play the violin wearing oven gloves. The answer is grass. It covers roughly two-thirds of British farmland, most of it too wet, too steep or too poor to grow a single crop a human can eat. Useless ground, agriculturally speaking, except for two machines that turn it into food. Those machines are the cow and the sheep. The cow works the lower pasture, the sheep the hills too steep and bleak for anything else, and between them they take grass no human could survive on and turn it into complete protein, saturated fat and the fat-soluble vitamins your brain runs on, through a gut that has been doing the job, unmodified, for forty million years. We are told these animals are the problem. They are the only reason that land feeds anyone at all.

The giant panda is the funniest animal on earth. It is a member of the order Carnivora. Its digestive tract is the standard carnivore kit: simple stomach, short intestine, a vestigial caecum, no proper fermentation chamber. Its genome contains all the enzymes for digesting meat. It lacks the enzyme genes for digesting cellulose, because it is not built to digest cellulose. It eats bamboo. Roughly twelve and a half kilos a day. For fourteen hours a day. Every day. It digests approximately seventeen percent of what it eats. Eight percent of the cellulose. The other eighty-odd percent passes straight through, undigested, out the other end. The bamboo is going through the panda almost as fast as the panda can shove it in. The panda spends most of its waking life eating, and most of its remaining waking life too exhausted by the inefficient digestion to do much of anything else. It sleeps a lot. It struggles to reproduce. It barely makes it. It survives by a margin so thin that for thirty years the species was officially classified as endangered. It was only downgraded to "vulnerable" in 2016, and only because the Chinese government spent decades running an enormous captive breeding programme, establishing dozens of protected reserves, and physically intervening in the species' reproduction because the natural one was not quite cutting it. The panda is what happens when a carnivore decides, evolutionarily speaking, that bamboo is a good idea. The panda is the case study for what veganism does to carnivore anatomy. The vegan, looking at the panda, sees a peaceful plant-eating bear and feels validated. The biologist, looking at the panda, sees a slowly-failing carnivore that exists today only because an entire civilisation chose to step in and prop it up. You are not a panda. You don't have a billion-pound conservation budget supplementing your B12. If you adopt the panda strategy without the panda's plot armour, the result is the panda outcome without the panda finale. Look at what we had to do to keep the panda going. Now ask yourself if that's the model you'd like to apply to your own biology.

Doctor: "Your LDL is still high. I'm adding a second statin." Patient: "I'm already on one. My legs ache." Doctor: "That's a known side effect. I'll add CoQ10." Patient: "And I'm tired all the time." Doctor: "Fatigue is common. I'll add modafinil." Patient: "My memory is foggy." Doctor: "Cognitive effects can occur. Donepezil should help." Patient: "I have a cough now." Doctor: "That'll be the ACE inhibitor I prescribed last visit. We'll swap it for an ARB." Patient: "I'm not sleeping." Doctor: "Zopiclone." Patient: "Heard that's addictive." Doctor: "We'll taper you with mirtazapine when the time comes." Patient: "My blood sugar has gone up." Doctor: "Statins can do that. Metformin." Patient: "I get diarrhoea on metformin." Doctor: "Loperamide." Patient: "I've gained weight." Doctor: "Ozempic." Patient: "I feel nauseous." Doctor: "Ondansetron." Patient: "I don't want to be on twelve medications." Doctor: "Anxiety is common at this stage. I'll add sertraline." Patient: "What if I just stopped the statin?" Doctor: "Absolutely not."

Cashews grow on trees with a shell so toxic that processing them requires protective equipment to avoid chemical burns. The shell contains urushiol - the same compound in poison ivy. This is the plant telling you: "Don't eat this." You ignored the warning. Cashews are also: - High in lectins (gut damage) - High in phytic acid (mineral blocker) - 45% carbohydrate (blood sugar spike) - Contain oxalates (inflammation trigger) They're never sold raw because raw cashews can cause allergic reactions so severe they require hospitalization. "Raw" cashews in health food stores are steamed to remove toxins. The plant's defense chemicals are so problematic they require industrial processing to make them merely "somewhat harmful" instead of "actively dangerous." Cashews are also a common allergen. Your immune system recognizes them as a threat and attacks. This is your body working correctly, not a malfunction. You're eating tree nuts that require chemical processing to not poison you, and calling it a healthy snack.