Human meat is not good for you. It carries unique and severe health risks that no other meat does, most notably the transmission of prions, which are fatal, incurable brain diseases. Beyond prions, consuming human tissue exposes you to bloodborne pathogens like hepatitis B, hepatitis C, and HIV. From a purely nutritional standpoint, human muscle tissue offers nothing that safer animal proteins don’t already provide, and the dangers far outweigh any caloric value.
Prion Disease: The Biggest Danger
The most serious risk of eating human meat is prion disease. Prions are misfolded proteins that, once inside your body, trigger a chain reaction: they convert your normal brain proteins into the same misfolded shape, which then convert more, and so on. The result is progressive, irreversible brain damage. There is no treatment, no cure, and no way to stop the process once it starts.
We know this because of kuru, a prion disease that devastated the Fore people of Papua New Guinea in the mid-20th century. The Fore practiced ritualistic cannibalism as part of mourning, consuming the bodies of deceased relatives. Women and children were most affected because they typically ate the brain, where prions concentrate most heavily. At its peak in the 1940s and 1950s, kuru killed at a rate of 35 per 1,000 people in affected villages.
Under a microscope, the brains of kuru victims showed widespread damage: shrunken neurons, sponge-like holes throughout the gray matter, and distinctive clumps of misfolded protein called “kuru plaques” concentrated in the cerebellum, basal ganglia, thalamus, and cortex. The disease causes tremors, loss of coordination, difficulty walking, and eventual death. Incubation periods can stretch years or even decades, meaning someone could eat contaminated tissue and not show symptoms for a very long time.
Prions are also exceptionally difficult to destroy. They resist the enzymes your body uses to break down proteins, and standard cooking temperatures do not neutralize them. Even medical sterilization procedures have failed to eliminate prions from surgical instruments in documented cases.
Bloodborne Pathogens in Human Tissue
Human tissue can harbor viruses that survive after death. Hepatitis B, hepatitis C, and HIV are all present in blood, body fluids, and tissue. Handling or consuming raw or undercooked human meat creates direct exposure to these pathogens. While cooking destroys many viruses, it does not eliminate all risks, particularly if the tissue is not heated uniformly or if someone is exposed during preparation through cuts or contact with mucous membranes.
Unlike livestock, which undergoes inspection and testing before reaching consumers, human tissue has no such safety chain. Any person’s body could carry infections they were never diagnosed with, making every exposure a gamble with unknown odds.
Bioaccumulation at the Top of the Food Chain
Humans sit at the top of the food chain, which means our tissues accumulate environmental toxins over a lifetime. Heavy metals like lead and mercury, along with industrial pollutants, build up in muscle and fat tissue through a process called bioaccumulation. Each step up the food chain concentrates these substances further. Eating a predator is always riskier than eating an herbivore for this reason, and humans are the ultimate predators in dietary terms. The older the person, the more decades of accumulated exposure their tissues would contain.
Nutritional Value Is Unremarkable
An average adult male body contains roughly 125,822 calories of fat and protein combined, enough to feed about 60 people for a single day. That sounds like a lot in total, but per serving, human muscle is comparable to other lean red meats. It offers protein, fat, and the same basic nutrients you’d find in pork or beef. There is nothing nutritionally unique or superior about human flesh. A study published in Scientific Reports noted that human muscle is actually lower in caloric density than most large game animals, which led the researcher to argue that prehistoric cannibalism was more likely ritualistic than nutritional.
In other words, even setting aside every health risk, you’d get more calories and protein per pound from a deer, a pig, or a cow, all without the possibility of acquiring an incurable brain disease.
Why the Risks Are Uniquely High
Eating within your own species creates hazards that cross-species consumption typically does not. Pathogens that have already adapted to human biology transfer far more efficiently between humans than from animals to humans. A virus living in cow muscle has to overcome significant biological barriers to infect a human. A virus living in human muscle faces no such barrier. The same principle applies to prions: the misfolded human prion protein is a near-perfect template for converting your own healthy prion proteins, because they share the same molecular structure.
This is why kuru spread so efficiently through the Fore people, and why the disease disappeared once cannibalistic practices stopped in the late 1950s and early 1960s. The largest documented outbreak of orally transmitted human prion disease ended when the exposure ended. No one who avoided consuming human tissue developed kuru.