Is Steak Good for Weight Loss? Honest Evidence Review

The honest answer: yes for lean cuts in moderate portions, with a real caveat. A 4–6 oz lean steak (top sirloin, tenderloin, top round, eye of round, flank, or 90–95% lean ground beef) delivers ~26–30 g of protein per 100 g cooked at ~190–220 kcal — high on the Holt 1995 satiety index^[2] (beef steak = 176, white bread = 100) and rich in heme iron, vitamin B12, zinc, creatine, and ~2.1–2.3 g of leucine per 100 g cooked, all of which support lean-mass preservation during a calorie deficit. The caveat: in 2015 the WHO International Agency for Research on Cancer classified processed meat as “Group 1: carcinogenic to humans” and red meat as “Group 2A: probably carcinogenic to humans,”^[3] citing colorectal cancer evidence. The actionable read: lean unprocessed steak 1–3 times per week as part of a protein-anchored weight-loss build is reasonable for most adults; daily ribeye plus bacon plus deli meat is not. Two adjacent variables matter as much as the cut. (1) Portion: a typical restaurant steak is 12–16 oz (~700–1,000 kcal of meat alone) and arrives with sides totaling 1,500–2,200 kcal — not a weight-loss meal. (2) Saturated fat: the Cochrane 2020 review by Hooper and colleagues^[4] across 15 RCTs and 56,675 participants found reducing saturated fat intake reduced combined cardiovascular events by ~17% (RR 0.83, 95% CI 0.70–0.98). Ribeye and T-bone are ~9 g saturated fat per 100 g cooked vs ~2.5–4 g for the lean cuts. Magnitude check for context: STEP-1 semaglutide^[6] produced −14.9% body weight at 68 weeks; SURMOUNT-1 tirzepatide^[7] −20.9% at 72 weeks. Food is not pharmacotherapy — but lean steak fits cleanly inside the protein-first eating pattern recommended for GLP-1 users protecting lean mass during titration.

At a glance

• Lean cuts deliver high protein density. Per 100 g cooked (USDA^[9]): top round ~190 kcal / 30 g protein / ~2.5 g saturated fat; top sirloin ~206 kcal / 26 g protein / ~4 g saturated fat; tenderloin (filet mignon) ~219 kcal / 26 g protein / ~4.5 g saturated fat.
• Ribeye and T-bone carry roughly 2× the calories and saturated fat. Ribeye (lean + fat) ~291 kcal / 24 g protein / ~9 g saturated fat per 100 g cooked; T-bone ~278 kcal / 24 g protein / ~8 g saturated fat^[9].
• Holt 1995 satiety index^[2]: beef steak = 176, fish = 225, eggs = 150, white rice = 138, boiled potatoes = 323 (white bread baseline = 100). Steak is highly satiating per calorie — above eggs and rice, below fish and potatoes.
• WHO IARC 2015 classification^[3]: processed meat = Group 1 (carcinogenic to humans); unprocessed red meat = Group 2A (probably carcinogenic to humans). Colorectal cancer is the primary endpoint.
• Saturated fat & cardiovascular events (Hooper 2020 Cochrane^[4]): 15 RCTs, n=56,675. Reducing saturated fat intake reduced combined cardiovascular events ~17% (RR 0.83, 95% CI 0.70–0.98). The American Heart Association recommends limiting saturated fat to <6% of daily calories.
• Lean-mass preservation (Pasiakos 2015^[5]): protein intake 1.5–2.0 g/kg/day attenuates lean-mass loss during energy deficit. Lean steak at ~26–30 g protein per 100 g cooked is one of the densest whole-food sources.
• Heme iron, B12, leucine, creatine. Beef delivers ~2.6 mg heme iron and ~0.5 g creatine per 100 g (raw), plus ~2.1–2.3 g of leucine per 100 g cooked — the per-meal leucine threshold for maximal muscle protein synthesis is ~2.5–3 g.
• Lescinsky 2022 Nat Med Burden of Proof^[8]: a conservative reanalysis of the red- meat risk evidence found weaker effect sizes than headline meta-analyses for ischemic heart disease and stroke once uncertainty is properly aggregated — colorectal cancer and T2D signals were the most robust.
• Magnitude vs GLP-1s: STEP-1 semaglutide^[6] −14.9% body weight at 68 weeks; SURMOUNT-1 tirzepatide^[7] −20.9% at 72 weeks. Food choice is portion and pattern, not pharmacotherapy.

Why steak works for weight loss (the protein math)

Lean steak is one of the highest protein-density whole foods in the meat case. Per USDA FoodData Central reference values^[9] for 100 g cooked, edible portion:

• Top round, lean only, broiled: ~190 kcal, 30 g protein, 7 g fat, ~2.5 g saturated fat, 0 g carbohydrate. The leanest common steak cut by a small margin.
• Top sirloin, lean only, broiled: ~206 kcal, 26 g protein, 11 g fat, ~4 g saturated fat. The default weight-loss-friendly cut at most steakhouses.
• Tenderloin (filet mignon), lean only, broiled: ~219 kcal, 26 g protein, 12 g fat, ~4.5 g saturated fat. More expensive, similar macros to sirloin.
• Flank steak, lean only, broiled: ~196 kcal, 26 g protein, 9 g fat, ~3.6 g saturated fat. Lean, flavorful, common in stir-fries and fajitas.
• Eye of round, lean only, roasted: ~158 kcal, 27 g protein, 4.7 g fat, ~1.7 g saturated fat. Among the leanest beef cuts available.
• 90–95% lean ground beef, pan-browned: ~184–198 kcal, 22–24 g protein, 10–11 g fat, ~4–5 g saturated fat per 100 g cooked.

At ~190–220 kcal and ~26–30 g of protein per 100 g cooked, lean steak sits in the same per-calorie protein-density tier as chicken breast (~165 kcal / 31 g protein) and salmon (~206 kcal / 22 g protein) — with the trade-off that beef carries more saturated fat and the WHO red-meat caveat we cover below.

The clinical case for prioritizing protein during weight loss is summarized in the Leidy 2015 consensus review^[1]: higher-protein meals (25–30+ g of protein per meal) increase fullness, reduce ad-libitum food intake at subsequent meals, raise the thermic effect of food (~20–30% of ingested protein calories are spent on digestion and metabolism, vs ~5–10% for carbohydrate and ~0–3% for fat), and improve lean-mass preservation during an energy deficit. A 5 oz (140 g) cooked lean sirloin hits the per-meal protein-synthesis target (25–40 g of high-quality protein, with ~2.5–3 g of leucine) in a single portion.

Satiety: where steak ranks in the actual data

The Holt 1995 satiety index^[2] is one of the most widely cited datasets in the food-satiety literature. The study fed 11–13 subjects per food isocaloric 240-kcal portions of 38 common foods, then rated fullness on a 7-point scale at 15-minute intervals over 2 hours. Scores are reported relative to white bread = 100. Higher = more satiating per calorie.

Beef steak scored 176. For context: fish = 225 (the most satiating protein in the index), lean beef = 176, eggs = 150, cheese = 146, white rice = 138, white bread = 100 (baseline), sugar-sweetened beverages ~100–120, pastries = 65. Boiled potatoes = 323 (the highest satiety-per-calorie food in the study). Steak ranks as a highly satiating food per calorie — well above starchy staples and refined grains, below only fish, potatoes, and a few other unprocessed foods.

The practical implication: a 4–6 oz lean steak portion (~190–280 kcal) at the center of a meal is doing real per-calorie fullness work. It also typically requires more chewing than chicken or fish, which slows eating speed — an independent variable in satiety-trial literature.

Lean cuts vs ribeye and T-bone: the calorie and saturated-fat gap

The single biggest variable in steak's weight-loss profile is the cut. Lean cuts (top round, sirloin, tenderloin, flank, eye of round, 90–95% lean ground beef) and the marbled premium cuts (ribeye, T-bone, porterhouse, prime rib, well-marbled strip steaks, 80% ground beef) sit on opposite sides of an unusually large calorie and saturated-fat gap.

Per 100 g cooked (USDA^[9]):

• Ribeye, lean and fat, broiled: ~291 kcal, 24 g protein, 21 g fat, ~9 g saturated fat.
• T-bone, lean and fat, broiled: ~278 kcal, 24 g protein, 20 g fat, ~8 g saturated fat.
• Porterhouse, lean and fat, broiled: ~284 kcal, 24 g protein, 20 g fat, ~8 g saturated fat.
• Strip / New York / Kansas City strip, lean and fat, broiled: ~250 kcal, 25 g protein, 16 g fat, ~6.5 g saturated fat.
• 80% lean ground beef, pan-browned: ~254 kcal, 26 g protein, 15 g fat, ~6 g saturated fat.

The marbled cuts deliver roughly the same protein per 100 g but ~50–100 more calories and ~2–3.5× the saturated fat compared with the lean cuts. A 6 oz (170 g) ribeye is ~495 kcal and ~15 g of saturated fat — before butter, oil, or any side. The American Heart Association recommends limiting saturated fat to <6% of daily calories (~13 g/day on a 2,000-kcal diet), so a single ribeye dinner can saturate the day's allowance.

For weight loss, the lean cuts are the default and the marbled cuts are the occasional. This is not a moral judgment on ribeye — the cut is delicious and not nutritionally worthless — but for the specific goal of a sustainable calorie deficit with cardiovascular safety, top sirloin and top round deliver the protein at ~70% of the calorie cost.

The WHO IARC red and processed meat call

In October 2015, the World Health Organization's International Agency for Research on Cancer (IARC) published Monograph 114, summarized in the Lancet Oncology by Bouvard and colleagues^[3]. The verbatim conclusions:

“The Working Group classified consumption of processed meat as ‘carcinogenic to humans’ (Group 1) on the basis of sufficient evidence for colorectal cancer.”

“The Working Group classified consumption of red meat as ‘probably carcinogenic to humans’ (Group 2A). In making this evaluation, the Working Group took into consideration all the relevant data, including the substantial epidemiological data showing a positive association between consumption of red meat and colorectal cancer and the strong mechanistic evidence.”

The IARC dose-response figure cited in the monograph: each 50 g/day of processed meat consumption (~one hot dog or two slices of deli ham) was associated with an 18% higher relative risk of colorectal cancer. The signal for unprocessed red meat (steak, ground beef, pork, lamb) was smaller and less certain — hence the 2A “probably” rather than Group 1 classification.

Two important framing notes:

• IARC hazard, not risk magnitude. Group 1 means the evidence of carcinogenicity is strong; it does not mean processed meat is as dangerous as tobacco (also Group 1) on an absolute risk basis. The lifetime absolute risk of colorectal cancer in the United States is ~4–5%; eating 50 g/day of processed meat is estimated to raise that to roughly 5–6%.
• Steak is the “probably”, deli meat and bacon are the “definitely”. The strongest cancer evidence is for processed red meat (cured, salted, smoked, fermented — bacon, ham, hot dogs, deli meats, sausages). Unprocessed lean steak occupies the weaker 2A tier.

The Lescinsky 2022 Burden of Proof analysis^[8] in Nature Medicine reanalyzed the unprocessed-red-meat evidence using conservative meta-analytic methods that aggregate study uncertainty more rigorously. It found the colorectal cancer and type 2 diabetes signals for red meat to be the most robust, with ischemic heart disease and stroke signals weaker than headline meta-analyses had reported. The net effect: the IARC red-meat call holds, but the magnitude of the unprocessed-red-meat penalty is probably smaller than the loudest headlines implied. Processed meat is the cleaner risk-flag.

Saturated fat: the AHA limit and the actual evidence

The American Heart Association recommends limiting saturated fat to <6% of daily calories — roughly 13 g/day on a 2,000-kcal diet. The strongest randomized evidence on saturated-fat reduction and cardiovascular outcomes is the Hooper 2020 Cochrane review^[4]. Across 15 randomized controlled trials and 56,675 participants, reducing saturated fat intake reduced combined cardiovascular events by ~17% (RR 0.83, 95% CI 0.70–0.98). The protective effect was strongest when saturated fat was replaced with polyunsaturated fat. The review found no clear effect on all-cause mortality or cardiovascular mortality alone.

Translated to steak choices:

• Lean cuts fit inside the AHA limit. A 6 oz (170 g) top sirloin is ~7 g saturated fat — about half the daily allowance. A 6 oz top round is ~4 g — a third.
• Marbled cuts can blow the daily allowance in one meal. A 6 oz ribeye is ~15 g saturated fat — over the daily AHA limit. A 12 oz restaurant ribeye is ~30 g — over twice the limit, before any butter or side.
• Frequency matters more than any single meal. The Cochrane evidence is about long-run intake, not single meals. Lean steak 1–3 times per week with the rest of the protein rotation coming from salmon, chicken, shrimp, eggs, beans, and tofu sits comfortably under the AHA ceiling.

Iron, creatine, leucine: where steak helps lifters

Steak has nutritional advantages beyond protein density that matter specifically for adults losing weight while preserving or building muscle.

• Heme iron, ~2.5–3 mg per 100 g cooked. Heme iron from animal foods is absorbed at ~15–35% efficiency vs ~2–20% for non-heme (plant) iron. Adult RDAs are 8 mg/day (men, post-menopausal women) and 18 mg/day (women of reproductive age). A 6 oz steak covers ~25–55% of those targets in one meal — useful for menstruating women, athletes, and anyone on a calorie deficit who is at risk for iron-deficiency anemia.
• Creatine, ~0.5 g per 100 g raw beef. Creatine supports phosphocreatine resynthesis during high-intensity training; the typical creatine-monohydrate supplement dose is 3–5 g/day. A 6 oz steak provides ~0.7–1.0 g of creatine — meaningful but not enough to replace supplementation for lifters who train regularly. See our creatine and weight loss review for full dose-response evidence.
• Leucine, ~2.1–2.3 g per 100 g cooked. Leucine is the primary amino-acid trigger for muscle protein synthesis; the per-meal threshold for maximal MPS is ~2.5–3 g. A 5–6 oz (140–170 g) steak portion delivers ~3.0–3.9 g — comfortably over the threshold.
• Vitamin B12, zinc, selenium, vitamin B6. Beef is one of the most concentrated whole-food sources of B12 (essential for nerve and red-cell function), zinc (immune function, wound healing), and selenium (antioxidant). On a calorie deficit, micronutrient density per calorie matters.

Portions: where most weight-loss steak meals fail

The cut and the portion together determine whether a steak meal is a 400-kcal weight-loss build or a 1,500-kcal sit-down dinner. The default restaurant steak is the failure mode.

• Typical chain-steakhouse steak: 12–16 oz. A 12 oz ribeye is ~700–900 kcal of meat alone; a 16 oz T-bone is ~900–1,200 kcal. Add the bread basket (~250 kcal), a baked potato with butter and sour cream (~400–500 kcal), creamed spinach or mac & cheese (~300–500 kcal), and the meal total is 1,500–2,200 kcal — roughly a day's calories for many adults pursuing a deficit.
• Weight-loss-build steak: 4–6 oz cooked (113–170 g). A 5 oz top sirloin (~290–310 kcal, ~37 g protein) plus 2 cups roasted non-starchy vegetables (~80–120 kcal) plus 1/2 cup starchy carbohydrate — baked sweet potato, brown rice, quinoa — (~110–130 kcal) plus 1 tsp olive oil (~40 kcal) lands at ~470–530 kcal with ~40 g protein. A real meal that fits inside a sustainable deficit.
• Splitting a restaurant steak is a real strategy. A 12 oz steak split between two diners delivers a weight-loss-build portion size for each. Many steakhouses accommodate this; some charge a $2–5 split-plate fee that is cheap relative to the calorie savings.
• The hidden calorie loaders are sides and sauces. Bearnaise, peppercorn cream, garlic butter, and chimichurri sauces add 100–300 kcal per ladle. Buttery mashed potatoes and creamed spinach add another 300–500 kcal. A 6 oz steak with steamed vegetables and half a baked potato (no butter) is a fundamentally different meal from the same steak with bearnaise, mac & cheese, and a roll.

Where steak fits for GLP-1 patients specifically

Patients on semaglutide ( Wegovy, Ozempic) or tirzepatide ( Zepbound, Mounjaro) are in a high-protein-priority eating pattern by clinical necessity. The SURMOUNT-1 DXA substudy^[7] documented that without a protein-and- resistance-training intervention, 25–39% of the total weight lost on tirzepatide was lean tissue rather than fat. See our deeper review of semaglutide and muscle mass loss and the protective protocol in GLP-1 + creatine + protein lean-mass preservation.

Lean steak has a specific role inside that protocol.

• High protein density per physical volume. GLP-1 receptor agonists delay gastric emptying. Patients in the nausea-dominant titration weeks often cannot tolerate large meal volumes. A 4 oz (113 g) lean sirloin (~230–250 kcal, ~30 g protein) delivers the per-meal protein-synthesis target in a physically small portion.
• Leucine hits the per-meal threshold easily. ~2.1–2.3 g leucine per 100 g cooked beef^[5] means a 5–6 oz portion clears the ~2.5–3 g per-meal MPS threshold — relevant when GLP-1-driven appetite suppression compresses the eating window and per-meal protein density becomes load-bearing.
• Caution: high-fat marbled cuts can worsen GI side effects. Slowed gastric emptying plus a fatty meal plus a recent GLP-1 dose is the recipe for the “feeling stuck” sensation, reflux, and worsened nausea many patients describe. Lean cuts (top sirloin, top round, eye of round, flank, 95% lean ground beef) are the safer default during titration. Save the ribeye for a maintenance-phase treat after dose stabilization, and eat slowly with small bites.
• Iron matters more on a GLP-1. Compressed eating volume during titration can drop micronutrient intake. Lean beef's heme iron, zinc, and B12 density per calorie are useful insurance against the micronutrient-thin diet trap.

The caveat that applies to all GLP-1 patients: hydrate, eat slowly, stop at first fullness rather than first plate-empty, and re-titrate portion sizes downward across the dose escalation. See common GLP-1 side-effect questions for the nausea, early-satiety, and food-aversion guidance.

Magnitude comparison: steak meals vs other protein-anchored plates

The chart shows the meal-build trade-off clearly. The home-cooked weight-loss build (5 oz lean steak, 2 cups non-starchy vegetables, a measured starch, 1 tsp olive oil) lands at ~420–500 kcal — the same calorie ballpark as chicken-and-rice or salmon-and-quinoa builds. A typical steakhouse plate is 3–4× that calorie load, primarily because of the cut, the portion size, and the sides.

How to build a weight-loss-friendly steak meal

The template that survives every published feeding-trial and cohort-study constraint is straightforward.

• Lean cut, 4–6 oz cooked (113–170 g): top sirloin, top round, tenderloin, flank, eye of round, or 90–95% lean ground beef. Trimmed of visible fat. Grilled, broiled, pan-seared with minimal oil, or sous-vide. Not breaded or chicken-fried.
• Non-starchy vegetables, 2 cups: roasted broccoli, asparagus, green beans, bell peppers, zucchini, mushrooms, leafy greens, snap peas. Roasted at 400°F with 1 tsp olive oil + salt is the highest-flavor-per-calorie default. ~50–100 kcal, ~5–8 g fiber.
• Starchy side, 1/2 cup measured: baked sweet potato, baked white potato (no butter), brown rice, quinoa, farro, or a slice of crusty bread (~80 kcal). The measured portion is the lever that distinguishes a 500-kcal meal from a 900-kcal meal.
• Fat source, measured: 1 tsp olive oil (~40 kcal) for cooking, OR 1/4 avocado (~80 kcal), OR a drizzle of chimichurri (~30–50 kcal per tbsp). Not multiple of these layered, and not bearnaise / peppercorn cream / garlic butter (~100–300 kcal per serving).
• Flavor layer: chimichurri, salsa verde, gremolata, garlic + herbs + lemon, mustard, freshly cracked black pepper, flaky salt, balsamic glaze. High flavor for low calorie cost.

Assembled, this is a ~450–550 kcal meal with 35–45 g of protein, 7–10 g of fiber, and the leucine + heme iron + B12 + creatine micronutrient profile that lean beef uniquely delivers. Eaten 1–3 times per week as part of a varied protein rotation with salmon, shrimp, chicken, eggs, tofu, and beans, lean steak fits cleanly inside a sustainable weight-loss pattern.

FAQs

Is steak good for weight loss?

Yes for lean cuts in moderate portions, with a caveat. A 4–6 oz lean steak (top sirloin, top round, tenderloin, flank, eye of round, or 90–95% lean ground beef) delivers ~26–30 g of protein per 100 g cooked at ~190–220 kcal — high on the Holt 1995 satiety index^[2] (beef steak = 176, white bread = 100) and rich in heme iron, B12, zinc, leucine, and creatine. The caveat: the WHO IARC^[3] classifies processed meat as Group 1 (carcinogenic to humans) and unprocessed red meat as Group 2A (probably carcinogenic to humans), with colorectal cancer the primary endpoint. The actionable read: lean steak 1–3 times per week as part of a protein- anchored weight-loss build is reasonable for most adults; daily ribeye plus bacon plus deli meat is not.

What is the best cut of steak for weight loss?

Top round and eye of round are the leanest common cuts (~158–190 kcal, 27–30 g protein, ~1.7–2.5 g saturated fat per 100 g cooked). Top sirloin is the most popular practical pick (~206 kcal, 26 g protein, ~4 g saturated fat per 100 g) — a good balance of flavor, tenderness, and lean profile. Flank steak and 90–95% lean ground beef are also solid choices. Avoid ribeye, T-bone, porterhouse, and well-marbled strip steaks for weight-loss defaults — they are ~50–100 kcal and 2–3.5× more saturated fat per 100 g than the lean cuts.

How many calories are in a steak?

Per 100 g cooked (USDA^[9]): top round ~190 kcal, top sirloin ~206 kcal, tenderloin ~219 kcal, flank ~196 kcal, eye of round ~158 kcal, ribeye ~291 kcal, T-bone ~278 kcal. A typical restaurant 12 oz (340 g) ribeye is ~990 kcal of meat alone before any butter, oil, or sides. A weight-loss- build 5 oz (140 g) cooked lean sirloin is ~290 kcal with ~37 g of protein.

Does steak cause cancer?

The WHO International Agency for Research on Cancer classified processed meat (bacon, hot dogs, ham, sausage, deli meats) as “carcinogenic to humans” (Group 1, like tobacco and asbestos) and unprocessed red meat (steak, ground beef, pork, lamb) as “probably carcinogenic to humans” (Group 2A) in 2015^[3]. The strongest evidence is for colorectal cancer. IARC reports an 18% relative risk increase per 50 g/day of processed meat consumed. The absolute lifetime US risk of colorectal cancer is ~4–5%; 50 g/day of processed meat is estimated to raise it to roughly 5–6%. The Lescinsky 2022 Nat Med Burden of Proof reanalysis^[8] found the colorectal cancer and T2D signals for red meat were the most robust; ischemic heart disease and stroke signals were weaker than headline meta-analyses had reported.

How much steak can I eat per week?

For weight loss with cardiovascular safety, a reasonable pattern is 1–3 lean steak meals per week, with portions capped at 4–6 oz cooked (113–170 g) per meal, and the rest of the protein rotation coming from chicken, fish, eggs, beans, tofu, and dairy. This pattern keeps total red- meat intake under ~350–500 g/week, which lines up with the World Cancer Research Fund recommendation to limit red-meat consumption to <500 g/week of cooked weight. Processed meat (bacon, hot dogs, deli meat, sausage) is best treated as an occasional food rather than a weekly staple.

Is steak good for building muscle while losing fat?

Yes. A 5–6 oz lean steak delivers ~30–39 g of high-quality protein with ~3.0–3.9 g of leucine — comfortably over the per-meal muscle-protein- synthesis threshold (~2.5–3 g leucine). The Pasiakos 2015 review^[5] documented that protein intake at 1.5–2.0 g/kg/day attenuates lean-mass loss during energy deficit. Steak's heme iron, creatine (~0.5 g/100 g raw), B12, and zinc add micronutrient density relevant to athletes. The missing piece is the resistance training itself — protein alone does not build muscle without a training stimulus.

Can I eat steak on Wegovy, Ozempic, or Zepbound?

Yes — lean cuts are arguably ideal for GLP-1 receptor agonist users protecting lean mass during the 25–39% lean-tissue loss documented in the SURMOUNT-1 DXA substudy^[7]. A 4–5 oz lean sirloin delivers the per-meal protein-synthesis target in a physically small portion — useful during titration weeks when delayed gastric emptying limits meal volume. Caution: high-fat marbled cuts (ribeye, T-bone, well- marbled strip) can worsen nausea, reflux, and the “feeling stuck” sensation when paired with a recent GLP-1 dose. Stick to lean cuts during titration; save the ribeye for after dose stabilization. Eat slowly with small bites and stop at first fullness. See common GLP-1 side-effect questions for nausea/early-satiety guidance.

Is steak better than chicken for weight loss?

Effectively comparable for lean cuts; chicken is a slight edge on the pure calorie-per-protein math. Skinless boneless chicken breast is ~165 kcal / 31 g protein per 100 g cooked; top sirloin is ~206 kcal / 26 g protein; top round is ~190 kcal / 30 g protein. Chicken wins on per-calorie protein density and on saturated fat (~1.1 g vs 2.5–4 g per 100 g). Steak wins on heme iron, B12, zinc, leucine density, and creatine. The right answer is a varied rotation — not picking a single winner. See chicken and rice for weight loss for the parallel deep-dive.

Is grass-fed steak better for weight loss?

Marginally, on the saturated-fat side, but the effect is small. Grass-fed beef has a slightly leaner fat profile (~1–2 g less total fat per 100 g) and a higher omega-3 fraction of total fat than grain-finished beef. Calorie differences between grass-fed and grain-fed lean cuts are small (~5–15 kcal per 100 g). Cut and portion size matter far more than grass-fed vs grain-finished. A 6 oz grain-finished top sirloin trimmed of visible fat is a better weight-loss meal than a 12 oz grass-fed ribeye.

Should I eat steak before or after a workout?

Either works for weight-loss outcomes; timing matters less than total daily protein intake and per-meal distribution. Steak is a slow-digesting whole-food protein, which makes it a better fit for a meal 2–4 hours before training or a post-workout dinner than for an immediately-pre- or immediately-post-workout meal (where faster proteins like whey hydrolysate or egg whites are more practical). The per-meal MPS threshold (~2.5–3 g leucine) is the load-bearing variable; a 5–6 oz lean steak clears it regardless of timing.

Related research and tools

• GLP-1 side-effect questions answered — the hub for nausea, early satiety, gastric emptying, and the eating-pattern adjustments that determine which steak cuts fit during titration.
• Semaglutide and muscle mass loss — the SURMOUNT-1 DXA evidence on lean-mass loss without a protein intervention. Lean steak is one of the densest whole-food protein anchors for the protective protocol.
• GLP-1 + creatine + protein lean-mass preservation — the full protein-and-resistance-training protocol that lean steak fits inside. Beef's ~0.5 g/100 g raw creatine adds modestly to dietary creatine intake.
• Is chicken and rice good for weight loss? — the most popular protein-anchored meal-prep template. Comparable per-calorie protein density to lean steak, with less saturated fat and no red-meat caveat.
• Is salmon good for weight loss? — the highest-satiety protein in the Holt 1995 index (fish = 225 vs steak = 176) plus omega-3s. The cleanest rotation partner to lean steak.
• Is shrimp good for weight loss? — the lowest-calorie high-protein swap: ~99 kcal / 24 g protein per 100 g cooked.
• Is peanut butter good for weight loss? — the calorie-dense plant-protein companion; 1 tbsp (~95 kcal) into a peanut-based stir-fry sauce pairs with lean flank-steak builds.
• Are protein shakes good for weight loss? — the supplement-side complement when a cooked-steak meal isn't practical.
• Best protein powder for weight loss on a GLP-1 — the whey-vs-casein-vs-plant-protein landscape for hitting daily protein targets when whole foods aren't available.
• Does creatine help with weight loss? — full creatine-monohydrate dose-response evidence; steak's ~0.5 g/100 g raw is modest vs the 3–5 g/day supplement standard.
• Wegovy (semaglutide 2.4 mg) — STEP-1 magnitude reference (−14.9% body weight at 68 weeks).
• Zepbound (tirzepatide) — SURMOUNT-1 magnitude reference (−20.9% body weight at 72 weeks).
• GLP-1 protein calculator — calculate your daily protein target (1.2–1.6 g/kg for weight loss, 1.6–2.2 g/kg with resistance training) and translate it to portions of steak, chicken, fish, yogurt, and whey.

Important disclaimer. This article is educational and does not constitute medical or nutrition advice. Patients with chronic kidney disease, advanced liver disease, hereditary hemochromatosis, hyperuricemia/gout, or familial hypercholesterolemia, or those at elevated colorectal-cancer risk (Lynch syndrome, familial adenomatous polyposis, inflammatory bowel disease, prior advanced adenomas), should follow individualized clinician guidance on red-meat intake. Patients on semaglutide, tirzepatide, or other GLP-1 receptor agonists in the nausea-dominant phase of titration should test individual tolerance with small lean- cut portions first; reduce portion sizes if early-satiety, reflux, or nausea worsen. USDA recommends cooking ground beef to an internal temperature of 160°F (71°C) and whole steaks to at least 145°F (63°C) followed by a 3-minute rest. PMIDs were independently verified against the PubMed E-utilities API on 2026-05-21; per-100-g nutrient values are drawn from USDA FoodData Central and carry typical food- database variance.

Last verified: 2026-05-21. Next review: every 12 months, or sooner if WHO IARC, AHA, or major red-meat-and-cardiovascular evidence updates publish.