Beef, round, full cut, separable lean only, trimmed to 1/4" fat, choice, cooked, broiled

Beef round is a primal cut sourced from the rear leg of cattle, specifically the upper hind leg and rump region. Historically, the round was developed as a workhorse muscle group in livestock, adapted for sustained activity and lean meat production. Unlike more marbled cuts like ribeye or strip loin, round cuts are notably leaner, with less intramuscular fat due to their functional role in locomotion. The general term “round” encompasses several sub‑cuts, including top round, bottom round, eye of round, and tip rounds. Each sub‑cut exhibits slight variations in texture and tenderness but shares the common characteristic of being lean and suited to slower cooking methods or dry heat when trimmed and broiled. Traditionally, these cuts have been favored for roast beef, stews, and dishes where long, low‑heat cooking methods tenderize the meat. In USDA classification, the beef round falls under “Beef Products,” and lean designations depend on fat trim; “separable lean only, trimmed to 1/4" fat” indicates that visible fat beyond a 1/4 inch layer has been removed, making it a leaner choice compared to untrimmed alternatives. The “choice” grade denotes moderate marbling as per USDA grading standards, balancing tenderness with leanness. In global cuisines, beef round appears in a variety of names and preparations—from British roast beef to French beef Bourguignon and Asian beef noodle soups. Each culinary tradition leverages the rich umami flavor typical of beef muscle protein, which increases when slow braised or broiled at high heat. Beef as a category has been central to human nutrition since the domestication of cattle thousands of years ago. Archaeozoological evidence indicates early cattle were kept not just for labor but also for meat and dairy, making beef a cornerstone protein in agrarian cultures. Over time, selective breeding and modern livestock management optimized meat quality and consistency. Today, lean cuts like round are often recommended for diets seeking high protein with controlled fat intake. While beef in general shares core nutritional traits—rich in heme iron, essential amino acids, B vitamins, and zinc—the specific profile varies with the cut and cooking method. Broiling lean beef round maximizes protein content while minimizing added fats, making it an appealing choice for contemporary health‑focused meal plans.

The nutrition profile of lean broiled beef round emphasizes its role as a high‑quality protein and micronutrient source. Per 100g cooked, this cut delivers 29.21g of protein, making it one of the more protein‑dense foods available in unprocessed animal proteins (USDA). This protein comprises all nine essential amino acids, including high amounts of leucine, isoleucine, and valine—branched‑chain amino acids critical for muscle protein synthesis and metabolic signaling. Alongside protein, this cut contains 7.31g of total fat, with 2.56g saturated fat, and negligible carbohydrates, categorizing it as a zero‑carb food suitable for low‑carbohydrate diets. Micronutrient composition further underscores beef round’s nutritional value. It provides 2.7mg of iron per 100g, predominantly in the form of bioavailable heme iron, which is absorbed more efficiently than non‑heme iron found in plant foods. Iron is essential for oxygen transport and energy metabolism, making beef round a valuable food for individuals at risk of iron deficiency. Additionally, the cut contains 3.17μg of vitamin B12, a nutrient absent in plant foods and crucial for neurological function and red blood cell formation. Beef also supplies significant amounts of zinc (4.64mg) and selenium (27.7μg), both critical for immune function and antioxidant defenses. Other B vitamins present include niacin, riboflavin, and B6, which support energy metabolism and cellular health (USDA). Despite its strong nutrient density, it’s important to contextualize beef’s fat composition. While lean, it still contains some saturated fat, which dietary guidelines suggest moderating for cardiovascular health. However, its fat profile also includes monounsaturated fats like oleic acid, which may have neutral or beneficial effects when balanced with overall dietary patterns. Comparatively, beef round is leaner than cuts like ribeye or T‑bone and offers a higher protein‑to‑fat ratio, especially when trimmed and broiled. This aspect makes it a preferred choice for individuals prioritizing protein without excessive calories from fat.

Beef round’s nutrient composition supports a range of physiological functions when consumed as part of a balanced diet. First, its high complete protein content supports muscle protein synthesis and maintenance, particularly significant for athletes and older adults at risk of sarcopenia. Protein quality from beef—rich in essential amino acids and especially leucine—stimulates muscle repair and growth in response to exercise. Iron and vitamin B12 are two micronutrients where beef excels, with iron in heme form showing superior absorption compared to non‑heme iron sources. Adequate iron intake helps prevent iron‑deficiency anemia, a common condition in women of reproductive age and endurance athletes. Vitamin B12, abundant in beef, is essential for neurological health, DNA synthesis, and red blood cell formation—deficiencies can lead to anemia and neurological symptoms. Emerging evidence suggests that nutrients in beef, beyond protein alone, may contribute to physical function and wellbeing. A systematic review of randomized controlled trials noted that amino acids and protein from beef and red meat were associated with improved markers of physical function in older adults with chronic disease, though evidence in healthy adults remains limited (positive effect of amino acids on wellbeing; further study needed) (). Beef also provides zinc and selenium, trace minerals crucial for immune function, antioxidant defense, and thyroid function. Zinc supports over 300 enzymatic reactions and plays a role in wound healing, while selenium is integral to glutathione peroxidase, an antioxidant enzyme. Deficiencies in these nutrients can impair immune responses and increase oxidative stress. Beyond micronutrients, beef supplies creatine—an organic compound beneficial for high‑intensity exercise performance and cognitive function—though not quantified in the USDA profile, it is naturally present in muscle tissue. Additionally, beef contains carnosine, which may buffer muscle pH during intense activity, and taurine, implicated in cardiovascular and neurological health. Research in nutritional sciences continues to explore how these non‑nutrient compounds contribute to overall health.

While lean beef offers valuable nutrients, consumption of red meat—especially in large amounts—has been associated with health risks in epidemiological studies. Red meat is classified as “probably carcinogenic to humans” by the International Agency for Research on Cancer (IARC), primarily based on associations with colorectal cancer risk, though this evidence is limited and based largely on observational data (). Cooking methods that produce heterocyclic amines (HCAs) and polycyclic aromatic hydrocarbons (PAHs), such as high‑heat grilling or charring, may increase potential carcinogenic compounds in cooked beef (). Observational cohort studies also link high intakes of red meat with higher risks of type 2 diabetes and cardiovascular disease risk factors, though randomized controlled trials have not unequivocally confirmed causality. Some data suggest that even modest consumption—two servings per week—may correlate with increased diabetes risk in large population samples, highlighting the importance of moderation (). Mechanistic hypotheses include effects of heme iron on oxidative stress and insulin resistance. Individuals with existing metabolic disorders or elevated cardiovascular risk should work with healthcare providers to tailor intake levels to their health status. Certain populations may need to limit beef intake due to specific conditions. For example, individuals with hemochromatosis—a genetic iron overload disorder—should restrict heme iron sources to prevent excessive iron accumulation. Those with chronic kidney disease may need to adjust protein and mineral intake, including red meat, to manage metabolic balance. Additionally, individuals with gout should moderate purine‑rich foods like beef to reduce uric acid production and flare risk. Pregnant women are advised to ensure beef is thoroughly cooked to reduce foodborne illness risk, as pregnancy increases susceptibility to pathogens such as Listeria and E. coli.

Source: USDA FoodData Central (FDC ID: 168616)