Pork blood is used in cooking, animal feed, industrial adhesives, and biomedical research. Its most visible role is in the kitchen, where it thickens stews, forms into soft curds for soups, and stars in sausages across dozens of cultures. But a significant share of the pork blood collected in slaughterhouses never reaches a plate, instead being dried into protein-rich meal for livestock feed or processed into specialty glues for wood products.
Stews, Soups, and Sauces
The most widespread culinary use of pork blood is as a sauce base or thickener in slow-cooked stews. Filipino dinuguan is the best-known example: pork meat and offal simmered in a rich, dark sauce made from fresh blood and vinegar. The name comes from “dugo,” the Filipino word for blood. Traditionally, dinuguan uses intestines, liver, kidneys, and lungs alongside the blood, and it’s served with puto (steamed rice cake). When a whole pig is roasted for a celebration, the cooks responsible for the lechon prepare dinuguan from the collected blood and innards so nothing goes to waste.
Regional variations across the Philippines alone show how flexible blood-based cooking can be. In Mindanao, sampayna folds in bamboo shoots, purslane, or banana heart. In the Bicol region, tinutungang dinuguan adds coconut milk, chiles, and bay leaves. Similar stews appear throughout Southeast Asia, Latin America (where dishes like sangrecita are common), and Europe. Polish czernina is a duck or pork blood soup sweetened with dried fruit, and many Scandinavian and Central European traditions use blood in savory gravies.
Blood Curd and Blood Tofu
In East and Southeast Asian cooking, pork blood is coagulated into soft, silky cubes sometimes called blood tofu or blood curd. The process is simple: fresh blood is poured into a container and allowed to set, then gently cooked in hot water until firm. Once cooled, the curd is cut into small cubes, typically around 15 millimeters across, and packed in water to keep it moist.
Blood tofu is one of the most common street foods in China, Taiwan, Thailand, and Vietnam. It shows up floating in bowls of noodle soup, stirred into congee, threaded onto skewers at night markets, and tossed into hot pot. The texture is custard-like, similar to soft tofu, and the flavor is mild and slightly mineral. In Thailand, it’s a standard addition to boat noodles. In Taiwan, it’s often coated in rice and steamed on a stick.
Blood Sausages
Nearly every European meat tradition includes some form of blood sausage. British and Irish black pudding, Spanish morcilla, French boudin noir, and Korean sundae all use pork blood as the primary binding ingredient, mixed with fat, grain or rice, onions, and spices, then stuffed into casings and cooked. These sausages rely on blood’s natural ability to coagulate when heated, which gives them a dense, sliceable texture. Korean sundae-guk takes the sausage a step further by simmering sliced rounds in a rich pork broth.
Keeping Blood Smooth While Cooking
The biggest challenge when cooking with pork blood is preventing it from clumping into a gritty, lumpy mess. Blood proteins coagulate quickly with heat, so cooks use a few standard techniques to keep the texture velvety. The most important is vinegar: adding acid to fresh blood before cooking slows coagulation and keeps the sauce smooth. For dinuguan, vinegar is stirred directly into the raw blood before it goes near the pot.
If you’re using frozen pork blood, check the ingredient list. Many commercially frozen blood products already contain vinegar as a preservative, so you’ll want to reduce or skip the extra vinegar in your recipe. When adding blood to a hot stew, pour it in gradually while stirring or whisking constantly. Once the color deepens and the sauce thickens, you can stop stirring. Straining the blood through a mesh sieve before use also catches any pre-formed clots that would create lumps.
Animal Feed and Fertilizer
Most pork blood collected at commercial slaughterhouses is not sold for human food. Instead, it goes through a rendering process that dries and stabilizes it into blood meal, a dark powder containing 80 to 90 percent protein. Blood meal is one of the most protein-dense byproducts in the livestock supply chain, and its primary commercial use is as a supplement in animal feed to boost protein and amino acid content. Pet food manufacturers also use it as an ingredient.
Blood meal works as an organic fertilizer, too. Its high nitrogen content makes it useful for enriching soil, though some countries restrict this application under regulations governing the use of slaughterhouse byproducts. In the United States, blood from livestock can be used as an ingredient in meat food products if it’s prepared under USDA inspection standards, but the vast majority still flows into the feed and fertilizer pipeline simply because the volumes are so large.
Industrial Adhesives
Blood-based glues have been important to the adhesive industry for centuries. The proteins in blood, when broken down with heat and a strong alkaline solution, form a sticky, spreadable paste that bonds well to wood and resists water. A 1942 U.S. patent describes one early method: boiling blood meal in a sodium hydroxide solution for up to 30 minutes, then allowing the dissolved protein to cool into a glue suitable for making plywood with strong, water-resistant bonds.
More recent research has refined the process. Scientists have hydrolyzed mixed porcine and bovine blood meal at high temperatures to produce a water-soluble protein that can be formulated into adhesives for wood composites. While synthetic adhesives dominate today’s market, blood-based alternatives remain relevant in applications where renewable or low-toxicity materials are preferred.
Biomedical and Veterinary Research
Pork blood plasma, collected and spray-dried into a shelf-stable powder, has become a tool in veterinary nutrition and biomedical research. When added to animal diets at concentrations of 2 to 8 percent, spray-dried porcine plasma reduces intestinal inflammation in multiple animal models. In weaned piglets, it lowers populations of harmful gut bacteria while tripling the population of beneficial lactobacilli. In mouse studies, it stimulates the growth of bacterial species associated with a healthy mucosal barrier and a balanced immune response, while reducing markers of inflammation.
These properties have made spray-dried plasma a subject of interest for managing gut health in young farm animals, particularly piglets during the stressful weaning period. Researchers have tested it in models of intestinal inflammation, acute lung inflammation, and colitis, consistently finding that it shifts the immune balance toward a less inflammatory state. The practical result for farmers is healthier animals during vulnerable growth stages.
Safe Handling and Cooking
Fresh pork blood is a raw animal product and carries the same food safety risks as raw pork. It should be refrigerated promptly after purchase and used quickly. When cooking dishes that feature blood as a primary ingredient, bring the dish to a full simmer and maintain it long enough for the blood to fully coagulate and cook through. The USDA recommends cooking pork products to a minimum internal temperature of 145°F (62.8°C) with a three-minute rest, and ground pork to 160°F (71.1°C). Blood-based stews and sausages that simmer for extended periods easily exceed these thresholds.
Standard food safety practices apply: wash hands and surfaces that contact raw blood, keep it separated from ready-to-eat foods, and refrigerate leftovers promptly. Fresh pork blood is available at many Asian and Latin American grocery stores, typically sold refrigerated or frozen in plastic tubs.