Beef, round, bottom round, steak, separable lean and fat, trimmed to 1/8" fat, choice, raw

Beef bottom round steak originates from the rear leg of cattle—the round primal cut—which is a well‑utilized muscle that supports locomotion. Because this muscle does extensive work during the animal’s life, it yields leaner cuts of meat with a robust beef flavor and a relatively firm texture. In the context of butchery, the round primal is divided into subprimals, with bottom round being one of the primary sections along with top round and eye of round. The bottom round specifically refers to the outside portion of the rear leg, which has slightly more connective tissue and a rustic texture compared to the top round, though it remains lean. Chefs and home cooks value bottom round for its versatility and affordability, often recommending slow cooking techniques to convert its collagen‑rich composition into tender, flavorful meat. Historically, beef cuts have evolved with culinary preferences and advances in refrigeration and transport. In the 19th century, beef butchery began to specialize into specific cuts as rail transport allowed meat to be shipped fresh to markets nationwide. The round primal—once prized for large roasts and braises—began being portioned into steaks as consumer demand for individual servings grew. Today, bottom round steaks are recognized across American, European, and global cuisines, often used in pot roasts, sandwiches (like the classic roast beef sandwich), and slow‑cooked dishes that break down the dense muscle fibers into succulent strands of protein. Several varieties and grades of bottom round exist. USDA Choice, as specified in the input, indicates a quality level with moderate marbling and flavor. Other grades like USDA Select or Prime may differ in fat content and tenderness. Cuts vary by trim level, with some being separated to lean only and others retaining some fat for flavor. Raw bottom round steak typically appears deep red with fine grains, and although less tender than premium cuts like ribeye or sirloin, proper culinary techniques can yield delightful results. Because it is lean and abundant in protein and micronutrients like iron and zinc, bottom round steak plays a valuable role in balanced diets, particularly where nutrient density is prioritized. This cut is especially common in budget‑friendly meal planning, as it delivers high‑quality nutrition per dollar compared to more premium steaks. Its firm texture makes it well suited for marinating, slow braising, or cutting thinly across the grain after short, high‑heat searing followed by finishing in liquid. With increasing interest in nutrient‑dense whole foods, bottom round steak remains a staple protein source with roots in traditional and modern cooking alike.

The nutrition profile of bottom round steak reflects its origin as a lean, muscle‑dense cut of beef. According to USDA data, a 100 g raw serving provides approximately 198 kcal, making it a moderate‑calorie protein source. The protein content is notably high—20.7 g per 100 g—which contributes significantly toward daily protein needs. Complete proteins found in beef contain all essential amino acids, including leucine, isoleucine, and valine, which are critical for muscle protein synthesis and metabolic regulation. In addition to macronutrients, bottom round steak provides a spectrum of micronutrients essential for health. Fats in bottom round steak are modest, with 12.2 g total fat per 100 g, including 4.8 g saturated fat. While saturated fats were once universally discouraged, modern evidence suggests that when consumed in moderation within a diverse diet, lean red meat fats contribute to energy without overwhelming total dietary fat. The lipid fraction also includes monounsaturated fatty acids, which can support nutrient absorption of fat‑soluble vitamins and cell membrane integrity. Micronutrient highlights include iron, zinc, and vitamin B12. Iron (1.84 mg) exists as heme iron in beef, a form with high bioavailability compared to plant sources. This form of iron supports hemoglobin synthesis and oxygen transport. Zinc (3.8 mg) plays an integral role in immune function, wound healing, and enzymatic activity. Vitamin B12 (1.76 µg) is essential for neurological health, DNA synthesis, and red blood cell formation—nutrients not found in plant foods. Potassium (319 mg) supports blood pressure regulation and electrolyte balance, while niacin (approx. 6.3 mg) contributes to metabolic energy production. Though carbohydrates are virtually absent in raw beef, the absence of sugars and fiber means bottom round steak focuses predominantly on protein and fats, aligning with low‑carbohydrate dietary patterns. Compared to other beef cuts, bottom round has less marbling than ribeye or New York strip, which lowers overall fat and calories but increases firmness. Compared to top round or eye of round, bottom round’s nutrient profile is similar in protein density but can contain slightly more connective tissue, affecting culinary applications. The detailed composition of amino acids further underlines beef’s quality as a protein source. Essential amino acids such as lysine (approx. 1.75 g per 100 g) and leucine (approx. 1.65 g per 100 g) are present in significant quantities, supporting muscle mass maintenance and metabolic health. Additionally, choline (approx. 86.5 mg) contributes to liver function and neurotransmitter synthesis. The robust micronutrient matrix of bottom round steak positions it as a nutrient‑dense component of diets where muscle, blood, and immune support are priorities. Understanding the full nutrient breakdown allows individuals to optimize intake based on age, activity level, and nutritional goals. For athletes, the high protein and B12 content support recovery and energy metabolism. For people at risk of iron deficiency—such as menstruating women or endurance athletes—bottom round steak can be a strategic inclusion. However, individuals monitoring saturated fat or cholesterol intake should balance portion sizes and pairing selections to maintain cardiovascular health goals.

Source: USDA FoodData Central (FDC ID: 168697)