Welcome to our top 10 bizarre exploration of blood’s most surprising applications. From culinary tricks to construction marvels, we unveil how this crimson fluid powers unexpected solutions.
10 Egg Substitute
In eras when animals were slaughtered only on rare occasions, nothing was allowed to go to waste. Blood, rich in albumin, found its way into soups and sauces as a thickening agent, performing a role usually reserved for eggs.
Even in more recent history, blood stepped in as an egg replacement. During World War II, German kitchens swapped egg whites for plasma, and classic dishes like coq au vin historically called for rooster blood to achieve the right texture.
Eggs often represent the costliest ingredient in baked goods. Spray‑dried plasma protein concentrates cost roughly a third of spray‑dried egg whites, and depending on the recipe and animal source, plasma can wholly or partially replace egg components.
Because blood albumin coagulates at a lower temperature than egg protein, cooking times shrink. The metallic taste can be masked with robust herbs and spices, making blood a viable, budget‑friendly egg alternative.
9 Blood Substitute
Traditional blood transfusions face hurdles: a limited shelf life and the necessity of blood‑type matching. For over a century, scientists have chased a universal blood substitute free from these constraints.
Cow blood offers a plentiful, affordable raw material. Its hemoglobin is refined into products like HemoTech and Hemopure, which boast several advantages over whole blood.
Whole blood survives about 42 days, whereas HemoTech stretches to 180 days and Hemopure can sit at room temperature for three years. Being pure hemoglobin, these substitutes eliminate the need for blood‑type compatibility.
Cow‑derived substitutes sidestep human viruses such as HIV. While mad‑cow disease is a theoretical risk, manufacturers source hemoglobin from regions with no reported cases and rigorously purify the product to eradicate pathogens.
The same company also produces Oxyglobin for dogs, which sparked a doping scandal when cyclist Jesús Manzano claimed an injection before a 2003 Tour de France stage, later blamed on heatstroke.
8 Plastic
In 1855, Francois Charles Lepage patented “Bois durci,” an early plastic forged from animal blood. He blended albumen from Paris slaughterhouses with poplar sawdust and dyes, then pressed the mixture under heat.
The process yielded a dense, polished material that mimicked wood. Iron in the blood reacted with the sawdust’s tannins, darkening the product and allowing it to imitate jet, a prized Victorian gemstone.
Bois durci could be turned into picture frames and other objects, behaving much like traditional wood.
Across the Atlantic, Dr. W.H. Dibble introduced “Hemacite” in 1877, an American counterpart made from cow blood, sawdust, and chemicals, all subjected to heat and pressure.
These blood‑based plastics were eventually eclipsed by synthetic alternatives such as Bakelite.
7 Fat Substitute
Processed meat products often carry high fat levels, prompting the industry to seek leaner, yet equally tasty, alternatives. Blood‑derived proteins offer fewer calories per gram than fat and are relatively inexpensive.
In a 2005 study, researchers crafted ham pâtés using cow globin, plasma, or a blend of both as fat replacers. A panel of 25 tasters found no significant differences in flavor, aroma, or texture compared to a control pâté, suggesting plasma can effectively lower fat content.
Because consumers favor ground beef with about 20 % fat, a product named Prime‑O‑Lean was developed. It combines hydrolyzed cow plasma with other ingredients to give lean beef the mouthfeel of its fattier counterpart.
6 Immune Booster
In intensive pig farming, piglets are weaned early, leaving them vulnerable to diarrheal diseases due to an immature immune system. Antibiotics can combat these infections but risk fostering resistant bacteria.
A blood‑based animal feed, made from cow or pig plasma, supplies antibodies much like a mother’s milk, bolstering the piglets’ defenses while also encouraging higher feed intake because of its palatability.
Human athletes can also benefit: Proliant Inc. processes slaughterhouse blood into ImmunoLin, a plasma‑based supplement marketed to the sports‑nutrition sector for immune support.
5 Iron Supplement
Hemoglobin’s heme iron is a cheap, highly bioavailable source of iron that resists interference from other dietary components. Leveraging slaughterhouse blood, researchers have explored its potential to combat anemia.
A Chilean trial fortified milk with 15 mg of bovine hemoglobin per liter. While the milk retained a café‑au‑lait hue and flavor, the heme quickly oxidized the product, causing rancidity, rendering this approach impractical.
Switching to low‑fat chocolate cookies proved effective. Children consuming three to four fortified cookies daily showed measurable increases in iron status. Similar “blood cookie” studies in Brazil and Mexico, using bovine and porcine hemoglobin respectively, confirmed the method’s efficacy.
4 Blood In Concrete
Roman aqueducts are famed for durability, a trait some scholars attribute to the inclusion of animal blood in the mortar mix. Blood introduced tiny air bubbles, improving workability and resistance to freeze‑thaw cycles.
When Thomas Telford completed Scotland’s Pontcysyllte Aqueduct in 1805, his mortar recipe echoed the ancient formula: water, lime, and cow blood.
More than a century later, French firm Innobat launched Airlith, a concrete blend using powdered animal blood and two cellulose additives. The resulting uniform air‑bubble network lightened the mix and boosted strength by at least 40 %.
Today, specialized chemical air‑entraining agents have largely replaced blood in modern concrete formulations.
3 Glue/Adhesive
Blood‑based adhesives have emerged independently across several cultures, utilizing the proteins from chickens, cows, or pigs. In the United States, the majority of such glues derive from bovine or porcine blood.
Although not waterproof, early blood‑aldehyde glues offered the best water resistance of their era, leading to increased use during World II for aircraft construction when water‑resistant adhesives were in high demand.
During the war, phenol shortages prompted manufacturers to blend dried blood with phenol‑based plywood glues. However, the mixture later proved unstable outdoors, separating after short exposure.
Modern formulations often combine blood glue with soybean glue, balancing each other’s weaknesses. Nonetheless, synthetic resins introduced after the war surpassed protein‑based glues in performance and cost, pushing the latter into niche applications.
2 Surimi
Surimi, a fish‑based paste most recognized in the U.S. as imitation crab, traditionally suffers from rapid degradation due to parasites like Kudoa in Pacific whiting, which form harmless cysts but accelerate spoilage.
Introducing cow blood into the surimi process dramatically improved enzyme inhibition, strengthening the gel and enhancing texture. This breakthrough boosted the market value of otherwise low‑priced whiting.
Following the 2003 mad‑cow disease scare, many countries banned bovine plasma in surimi, prompting a search for alternatives.
Egg white proved less effective, spurring research into plasma from pigs, chickens, and trout as viable substitutes for maintaining surimi’s desired properties.
1 High Blood Pressure
Hypertension, a common ailment among seniors, is often treated with ACE inhibitors that block the conversion of angiotensin I to the vasoconstrictor angiotensin II, thereby lowering blood pressure within hours of oral intake.
Conventional ACE inhibitors can trigger side effects such as skin rashes, prompting interest in natural alternatives that may offer milder profiles while retaining efficacy. Many foods contain ACE‑inhibitory peptides.
Slaughterhouse blood—typically discarded as waste—provides a cheap source of such inhibitors. Researchers have extracted ACE‑blocking compounds from pig, chicken, and cow blood, with both plasma and hemoglobin showing promise as raw materials.
The article’s author, a fan of biology, parasites, and well‑crafted cartoons, invites readers to follow her on Tumblr for more quirky science insights.