Beef, variety meats and by-products, spleen, raw

Beef spleen is a type of organ meat, or offal, harvested from cattle as part of nose‑to‑tail butchery traditions. Unlike common retail cuts like steaks and roasts, spleen comes from the abdominal cavity of the animal and historically has been consumed in many cultures for its nutritional richness. In traditional European and Asian cuisines, organ meats including spleen were prized for being economical sources of micronutrients, especially iron and B vitamins. In the U.S., consumption of spleen is less common, but it remains a staple in certain regional dishes and among culinary enthusiasts. Culturally, organ meats have long been valued not just for sustenance, but also for their role in ceremonial or traditional meals. For example, in some Mediterranean cuisines, organ meats are featured in stews and slow‑cooked dishes, while in some Asian cuisines, they may be stir‑fried or served with spices that complement their strong flavor profile. Beef spleen’s texture tends to be soft and dense, with a rich, almost liver‑like taste that some compare to other offal. Because it’s not as widely marketed as muscle meats, sourcing spleen often involves visiting specialty butchers, ethnic markets, or ordering from farms practicing whole‑animal processing. From an animal biology perspective, the spleen serves as a blood filter in cattle, much as it does in humans. It stores and recycles red blood cells and houses immune cells, functions that contribute to the nutrient profile humans derive when consuming spleen. While no formal USDA varieties exist (the term generally refers to raw beef spleen), its nutritional composition can vary slightly based on the cattle’s diet and breed. Grass‑fed beef spleen may offer marginal differences in micronutrient profiles compared to grain‑fed, though data on these differences specifically for spleen are limited. Overall, beef spleen is recognized as one of the most nutrient‑dense parts of the animal, often surpassed only by liver in terms of vitamin and mineral concentration.

Beef spleen is remarkably nutrient‑dense. Per 100 g of raw spleen, you get 105 calories, 18.3 g of high‑quality protein, and minimal fat (3.0 g) and carbohydrates (0 g), making it a low‑energy, nutrient‑dense food suitable for calorie‑controlled diets. What sets beef spleen apart is the exceptional iron content — 44.55 mg per 100 g — which equates to several times the daily recommended intake for most adults. This iron is heme iron, which humans absorb more efficiently than non‑heme iron found in plants. Alongside iron, spleen provides 45.5 mg of vitamin C, a rare feature in red meat, which enhances iron absorption and supports collagen synthesis. The organ also provides 5.68 µg of vitamin B12, essential for red blood cell formation and neurological function. Potassium (429 mg) contributes to electrolyte balance and cardiovascular health, while selenium (62.2 µg) is crucial for thyroid health and antioxidant defenses. Compared to typical muscle meats like beef chuck or sirloin, spleen has similar protein but stands out for its micronutrients. For example, lean beef steaks average about 2 to 3 mg of iron per 100 g, far below spleen’s 44.55 mg. Compared to beef liver, spleen has higher vitamin C, though liver typically has more vitamin A and broader vitamin B profiles. Amino acid analysis shows spleen delivers all essential amino acids, contributing to its classification as a complete protein. For populations with higher iron needs — such as pregnant people (though offal intake must be carefully managed) or athletes — spleen’s iron density is notable. However, its very high cholesterol content (263 mg per 100 g) warrants moderation for those monitoring lipid profiles. Overall, beef spleen exemplifies how offal can dramatically elevate the micronutrient intake of a diet when consumed thoughtfully.

Scientific literature specifically on beef spleen consumption in humans is scarce, but nutrient‑based evidence supports several potential benefits. First, the heme iron in spleen is highly bioavailable, meaning the body can absorb it more easily than non‑heme iron, which is critical for preventing iron deficiency anemia — one of the most common nutrient deficiencies globally. While most iron research focuses on supplements and plant vs. animal iron sources, it is well established that heme iron improves hemoglobin synthesis and energy levels. Organ meats historically provided iron in traditional diets before fortified foods became prevalent. The high vitamin B12 content of spleen also supports red blood cell production and neurological health; B12 deficiency is linked with megaloblastic anemia and cognitive disturbances. Research shows animal‑derived B12 improves biomarkers of energy metabolism, particularly in older adults with marginal deficiencies. Selenium, present in substantial amounts in spleen, is associated with antioxidant enzyme function and thyroid hormone metabolism. Selenium status correlates with markers of oxidative stress and thyroid health — particularly relevant in regions with low soil selenium. While direct studies on spleen intake are absent, observational data link diets rich in lean red meats with maintained muscle mass in older adults, partly due to essential amino acid profiles like leucine and isoleucine. A systematic review of beef and its nutrients found potential benefits for physical function and wellbeing in adults 50 years and older, though the evidence was heterogeneous and did not isolate organ meats specifically. Some traditional health frameworks attribute immune support to spleen consumption based on its role in filtering blood and housing immune cells, but modern clinical evidence for direct immune enhancement from consuming animal spleen is not established. Supplements derived from bovine spleen that are marketed for immune effects lack solid clinical validation, and proteins from consumed food are digested rather than absorbed intact as functional peptides. Thus, benefits are likely mediated by nutrient provision (iron, B12, selenium) rather than organ‑specific peptides.

Despite its nutrient density, beef spleen carries considerations. Its very high cholesterol content (263 mg per 100 g) may be a concern for people with dyslipidemia or established cardiovascular disease. While dietary cholesterol’s impact varies among individuals, those advised to follow low‑cholesterol diets should moderate intake. People with hemochromatosis (iron overload disorder) should avoid highly iron‑rich foods like spleen to prevent excessive iron accumulation, which can damage organs. Pregnant individuals need tailored guidance on organ meat consumption because high iron is beneficial — yet vitamin A toxicity is not an issue here due to spleen’s lack of vitamin A, but total nutrient intake must be balanced with prenatal recommendations. Additionally, the high heme iron content may interact with certain medications, such as tetracycline antibiotics, which can chelate with iron and reduce absorption; consult healthcare providers if on medications. Food safety risks are like those for any raw meat: improper handling can lead to bacterial contamination and foodborne illness. Wash hands and utensils thoroughly after handling raw spleen and prevent cross‑contamination with ready‑to‑eat foods. Individuals with compromised immune systems should avoid raw organ meats entirely and rely on properly cooked preparations.

Source: USDA FoodData Central (FDC ID: 169454)