Pigs contribute to human life far beyond the dinner table. Their organs supply lifesaving pharmaceuticals, their tissues are implanted directly into human bodies during surgery, their manure generates renewable energy, and their bones are being turned into tools for cleaning up polluted water. The sheer range of non-meat uses reflects how biologically similar pigs are to us and how thoroughly the livestock industry has learned to repurpose nearly every part of the animal. Some of these uses are centuries old; others are at the cutting edge of bioengineering.
Pharmaceuticals From Pig Tissue
Two of the most historically important drugs in medicine came from pigs. Insulin, the hormone that keeps blood sugar in check, was sourced from pig pancreases for decades before synthetic human insulin became available. Porcine insulin differs from the human version by just a single amino acid at the end of one of its protein chains, which made it effective enough to keep millions of people with diabetes alive throughout the twentieth century.1PubMed. Antigens in Insulin Determinants of Specificity of Porcine Insulin in Man Synthetic “human” insulin eventually replaced it on the market, though a Cochrane review noted that human insulin was introduced without clear scientific proof that it was better than highly purified porcine insulin.2PubMed Central. ‘Human’ insulin versus animal insulin in people with diabetes mellitus In some countries, porcine insulin is still used and remains a viable option for people who react poorly to synthetic alternatives.
Heparin, the blood-thinning drug given to surgical patients and people at risk of dangerous clots, is another pig-derived pharmaceutical. Most of the world’s heparin supply comes from the mucosal lining of pig intestines, a slaughterhouse byproduct that would otherwise be discarded. Researchers continue refining extraction methods to pull heparin from various dried pig byproducts, including intestines and other organs, using chemical and enzymatic processes to isolate the active compound.3PubMed Central. Development of effective heparin extraction method from pig by-products and analysis of their bioavailability Global demand for heparin is enormous, and the pharmaceutical industry’s dependence on pig-sourced material has raised supply-chain concerns during periods when swine diseases reduce herd sizes.
Heart Valves and Surgical Implants
Surgeons have been implanting pig-derived heart valves in human patients since the 1970s. These bioprosthetic valves are made from either whole porcine valve tissue or from bovine pericardium (the sac around a cow’s heart), but porcine valves remain one of the two main biological options for people who need a valve replacement and want to avoid the lifelong blood-thinning medication required with mechanical valves. Long-term follow-up data show that porcine aortic valves have freedom from primary tissue failure above 99% at five years after implantation, though durability does decline further out, and leaflet tears account for the majority of structural failures that eventually require a second surgery.4The Journal of Thoracic and Cardiovascular Surgery. Clinical durability of the Hancock porcine bioprosthetic valve Studies comparing porcine and pericardial valves have tracked thousands of implants over periods up to 24 years, finding that the probability of needing a replacement for structural valve deterioration stayed in the single digits at 15 years for aortic positions.5PubMed. Durability of pericardial versus porcine bioprosthetic heart valves
Beyond heart valves, pig skin is processed into acellular dermal matrix, a scaffold-like sheet used to cover severe wounds, support tissue reconstruction after mastectomy, and repair hernias. The processing strips away all the pig’s living cells while preserving the structural collagen framework, so the patient’s own cells can migrate into the scaffold and gradually replace it. Clinical evidence suggests minimal long-term differences between porcine and human-sourced dermal matrix, although porcine versions do trigger a brief early immune response that resolves on its own.6PubMed Central. Comparison of porcine and human acellular dermal matrix outcomes in wound healing: a deep dive into the evidence For badly damaged extremities where large wound coverage is needed, porcine dermal matrix has been shown to improve wound healing success rates and reduce the risk of surgical emergencies.7PubMed Central. Xenogenic (porcine) acellular dermal matrix is useful for the wound healing of severely damaged extremities
Xenotransplantation and Whole-Organ Research
The shortage of human donor organs has pushed scientists to investigate whether genetically modified pig organs could be transplanted into people. This field, xenotransplantation, has made headline-grabbing progress in recent years. The core challenge is that the human immune system immediately attacks unmodified pig tissue, a process called hyperacute rejection. Researchers address this by knocking out pig genes that produce the sugar molecules our immune system recognizes as foreign and inserting human genes that help the transplanted organ dampen immune attacks.8PubMed Central. Genetically engineered pigs for xenotransplantation: Hopes and challenges
A 2025 study published in Nature described a gene-modified pig liver transplanted into a human patient. The donor pig had three key sugar-producing genes knocked out and was engineered to overexpress human proteins that regulate the complement immune system and prevent blood clotting, including human thrombomodulin to activate antithrombotic pathways.9Nature. Gene-modified pig-to-human liver xenotransplantation Pig kidneys and hearts have also been transplanted into human recipients in clinical settings over the past few years, though survival times remain limited. The field is still experimental, but the pace of progress is remarkable compared with even a decade ago.
Research Models for Human Disease
Mice get most of the attention as laboratory animals, but pigs are increasingly valued as research models precisely because they are so much closer to humans in size, organ structure, and physiology. A pig’s cardiovascular system, digestive tract, skin, and immune responses resemble ours more closely than a rodent’s do, making them better stand-ins for testing surgical techniques, medical devices, and drug responses before moving to human trials.10PubMed Central. Advancing swine models for human health and diseases Their genomic similarity to humans further strengthens their relevance as translational models, meaning findings in pigs are more likely to hold up when applied to people.11PubMed. Importance of the pig as a human biomedical model
Pig models are used in research on cardiovascular disease, diabetes, wound healing, neurology, and orthopedics, among other fields. Forensic scientists also use pig carcasses to study decomposition and ballistic effects. Researchers have used pigs to simulate and understand the backspatter of blood from cranial gunshot wounds, for example, because pig skin and skull anatomy offer a realistic proxy for human tissue in these scenarios.
Gelatin and Food Industry Ingredients
Gelatin is one of the most ubiquitous pig-derived products in daily life, and many people who encounter it in gummy candies, marshmallows, yogurt, and pharmaceutical capsules do not realize it comes from animal collagen. Pigskin is a major source. The production process involves treating the skin with acid or alkali to break down the collagen, then extracting the gelatin at controlled temperatures. Research on pigskin gelatin has found that extraction at moderate temperatures with dilute acetic acid produces gelatin with gel strength and protein content comparable to commercial-grade products.12Procedia Food Science. The Effects of Acetic Acid Concentration and Extraction Temperature on Physical and Chemical Properties of Pigskin Gelatin This means the stuff holding your vitamin capsule together or giving texture to a dessert quite possibly started as pigskin from a slaughterhouse.
Pigskin gelatin also has industrial applications beyond food. It serves as a binder in photographic film, a coating agent in paper manufacturing, and a component in some cosmetics. For people who avoid pork for religious or dietary reasons, the pervasiveness of pig-derived gelatin in everyday products can be a real concern, and it has driven demand for alternatives sourced from fish or plants.
Bristles, Hair, and Keratin
Pig bristles have been used in brushes for centuries, and they remain prized for paintbrushes and certain cleaning brushes because of their stiffness, natural taper, and ability to hold paint well. The underlying material is keratin, the same structural protein found in human hair and fingernails. Keratin extracted from pig bristles, along with that from wool, feathers, hooves, and horns, is now being studied as a renewable biopolymer with applications in biomedicine, cosmetics, and biodegradable packaging.13PubMed Central. Keratin from Animal By-Products: Structure, Characterization, Extraction and Application-A Review The idea is to take a slaughterhouse waste stream and convert it into films, hydrogels, or fibers for wound dressings and tissue scaffolds. It is still largely a research-stage endeavor, but it reflects a broader trend of finding high-value uses for parts of the pig that were once thrown away.
Bioenergy From Pig Fat and Manure
Pig fat, or tallow, can be converted into biodiesel through a chemical process called transesterification. Researchers have demonstrated that pig tallow yields biodiesel with properties meeting international fuel standards, including appropriate density, viscosity, and flash point.14ACS Sustainable Chemistry & Engineering. Waste Pig Carcasses as a Renewable Resource for Production of Biofuels One study found that fat rendered from pig carcasses made up about 20% of the carcass weight, and the conversion rate from that fat to usable biodiesel reached 87%. Ultrasound-assisted production methods have pushed yields even higher, with one lab achieving nearly 98% conversion of pig tallow to biodiesel under optimized conditions.15Renewable Energy. Enhanced ultrasonic assisted biodiesel production from meat industry waste (pig tallow) using green copper oxide nanocatalyst
Pig manure, meanwhile, is a well-established feedstock for biogas production through anaerobic digestion, the same process used in municipal wastewater treatment. Bacteria break down the organic matter in an oxygen-free environment and produce methane-rich gas that can be burned for heat or electricity. Studies have measured methane content as high as 83% in biogas generated from pig slurry under optimized conditions.16Energy Reports. A biochemical methane potential of pig slurry Mixing pig manure with plant waste like rice straw further boosts gas output, because the combination balances the nutrients that the bacteria need to work efficiently.17PubMed Central. Anaerobic Co-Digestion of Pig Manure and Rice Straw: Optimization of Process Parameters for Enhancing Biogas Production and System Stability Large-scale pig farms in Europe and Asia increasingly capture this biogas on-site, turning a waste-management headache into a revenue stream.
Fertilizer and Soil Amendment
Pig manure has been spread on fields for as long as people have raised pigs, but processed pig byproducts offer a more concentrated and controlled alternative. Meat and bone meal, a rendered powder made from slaughterhouse leftovers including pig bones, contains roughly 8% nitrogen, 5% phosphorus, and 10% calcium, making it a potent organic fertilizer. Field experiments with spring wheat showed linear yield increases as more meat and bone meal was applied, and the phosphorus it delivered was so abundant that no additional phosphorus fertilizer was needed in the year following application.18Nutrient Cycling in Agroecosystems. Meat and bone meal as nitrogen and phosphorus fertilizer to cereals and rye grass For organic farming operations that want to avoid synthetic fertilizers, meat and bone meal from pigs and other livestock fills a practical niche.
Cleaning Up Contaminated Soil and Water
A newer and less intuitive use of pig bones is in environmental cleanup. When pig bones are heated at high temperatures in low-oxygen conditions, they become biochar, a porous, carbon-rich material that acts like a sponge for heavy metals. Pig bone biochar produced at 500°C showed strong copper-adsorption capacity, making it a potential low-cost tool for treating contaminated wastewater, particularly in regions with both significant livestock production and limited water-treatment infrastructure.19Results in Engineering. Pig bone-derived biochar from food industry waste for heavy metal remediation: Sustainable consumption and production
When applied to contaminated soil, bone char has been shown to lock up heavy metals like copper, zinc, lead, and cadmium in forms that plants cannot easily absorb. In one study, leachability of copper dropped by over 90%, and lead leachability fell by nearly 68% after two months of bone char application, while pea plants grown in the treated soil accumulated less metal and grew better than controls.20Science of The Total Environment. One stone two birds: Bone char as a cost-effective material for stabilizing multiple heavy metals in soil and promoting crop growth The mechanism involves surface precipitation and the formation of lead-phosphate and lead-carbonate compounds on the biochar surface.21Food and Bioproducts Processing. Valorization of Meat and Bone Meal through pyrolysis for soil amendment or lead adsorption from wastewaters Turning slaughterhouse waste into a remediation tool is appealing both economically and environmentally, and the research so far looks promising enough to warrant scaling up.
Truffle Hunting
One of the most colorful non-meat uses of pigs is their traditional role in hunting truffles, the underground fungi prized by chefs worldwide. Pigs have an instinctive attraction to truffles because the fungi produce a compound called dimethyl sulphide that mimics a pheromone found in boar saliva, triggering foraging behavior in sows. Research confirmed that both trained truffle dogs and pigs detected solutions of dimethyl sulphide, identifying it as the likely chemical signal that allows animals to locate buried truffles. In practice, many truffle hunters have switched to trained dogs, because pigs tend to eat the truffles they find and are harder to restrain. But the image of a pig snuffling through a French oak forest remains iconic, and some traditional harvesters still use them.
Tissue Engineering and 3D Bioprinting
At the frontier of regenerative medicine, pig tissue is being used as raw material for bioinks, the printable gels loaded into 3D bioprinters to build living tissue structures. Researchers have developed a bioink made from decellularized porcine extracellular matrix, the structural scaffolding left behind after all pig cells are removed. This material retains the natural biochemical cues that encourage human cells to attach, grow, and form functional tissue. A recent study formulated a porcine-derived bioink for printing meniscus tissue and found that at a 7% concentration, it exhibited shear-thinning behavior suitable for printing while maintaining a stable gel-like structure.22Virtual and Physical Prototyping. Development of a porcine decellularized extracellular matrix (DECM) bioink for 3D bioprinting of meniscus tissue engineering: formulation, characterisation and biological evaluation The hope is that these pig-derived bioinks could eventually help print replacement cartilage, skin patches, or even organ components on demand.
Art Supplies and Historical Pigments
Bone black, also called bone char or ivory black, is a pigment produced by charring animal bones at high heat. Pig bones have long been among the raw materials used. The resulting deep black powder gets its color from a mixture of carbon (from the burned collagen) and hydroxyapatite (the mineral component of bone). Analytical chemistry has identified a characteristic spectral signature of bone black related to cyanamidapatite, a degradation product formed when nitrogen from the bone’s collagen and carbon from the combustion process react within the hydroxyapatite structure. This signature helps art conservators distinguish bone black from other black pigments in historical paintings and artifacts. The pigment has been used since antiquity and was a staple on European painters’ palettes for centuries. Today it remains commercially available as an artist’s pigment, still produced from animal bones including those of pigs.
Pigskin also has a long history in bookbinding. Pigskin leather is distinctively textured, durable, and resistant to moisture, which made it a popular choice for binding European books from the medieval period through the Renaissance. Some of those pigskin-bound volumes survive in excellent condition in rare-book collections today, a testament to the material’s longevity.
Ecological Roles of Free-Ranging Pigs
Wild boar, the ancestor and close relative of domestic pigs, play an active ecological role through their rooting behavior. When boar dig through soil searching for food, they create small-scale disturbances that open gaps in dense vegetation. A five-year field experiment found that these soil disturbances, even when they affect less than 2% of grassland area at any given time, significantly increase plant species diversity. Plots that had been disturbed still supported more species than undisturbed plots even eight years later.23PubMed Central. Wild boar (Sus scrofa) increases species diversity of semidry grassland: Field experiment with simulated soil disturbances Some conservation land managers have experimented with using domestic pigs in a similar way, releasing them onto overgrown sites to break up matted vegetation and expose bare soil that allows dormant seeds to germinate. It is a niche practice, and pigs can cause serious damage if stocking density is too high, but it highlights how the same rooting instinct that frustrates gardeners can be harnessed as a land-management tool.