Chicken vs Beef Protein: Which Is Better for Building Muscle?

You want more protein, and the grocery store gives you two default answers. Chicken breast is the bodybuilding staple. Beef has the reputation for building real muscle. One side calls red meat dangerous, and the other calls chicken boring and nutritionally thin.

Most of that argument skips the numbers. Once you put the cuts next to each other, the protein barely differs. What changes is the fat, the minerals, the price and how much red meat you already eat. Those are the trade-offs worth thinking about.

This guide sets eight common cuts side by side with USDA data, then walks through protein quality, the muscle-building studies, the micronutrients where beef pulls ahead, weight loss and bulking, the health research on red meat, and the cost of each gram of protein.

Chicken vs Beef Protein per 100 g, Cut by Cut

All values below are per 100 grams of cooked meat from the SR Legacy database in USDA FoodData Central. Chicken cuts are skinless. Steaks are the lean portion with visible fat trimmed. Ground meats are pan-browned crumbles.

Source: USDA FoodData Central, SR Legacy (FDC 171477, 172388, 171117, 168635, 172144, 174755, 174034, 171799). Daily Values for adults: iron 18 mg, zinc 11 mg, vitamin B12 2.4 µg.

Three patterns stand out. Protein clusters between 23 and 31 grams for every cut, so no option is a protein disaster. Fat and calories swing far more than protein does, from 165 calories in chicken breast to 272 in 80% lean ground beef. And beef wins every mineral and vitamin column except calories, by a wide margin.

One thing to watch when you log food: these are cooked weights. Meat loses water as it cooks, so the protein per 100 grams rises. A raw chicken breast has 22.5 grams of protein per 100 grams, which means a 170-gram (6-ounce) raw breast gives about 38 grams of protein and shrinks to roughly 125 grams on the plate. Log raw weight against raw values or cooked against cooked, never a mix.

Which has more protein, chicken or steak?

Chicken breast, by a small margin. Roasted skinless breast has 31.0 grams per 100 grams, lean top sirloin 30.3 grams and lean ribeye 27.4 grams. The gap grows per calorie: chicken breast gives about 19 grams of protein per 100 calories, sirloin 16 and ribeye 13.

Does ground beef or chicken have more protein?

Ground beef, in most comparisons. Per 100 grams cooked, 93% lean ground beef has 28.9 grams of protein, 85% lean has 27.7 and 80% lean has 27.0. USDA's generic ground chicken has 23.3 grams, along with 10.9 grams of fat, about the same fat as 93% lean ground beef. Ground chicken made only from breast meat is leaner and higher in protein, so the fat percentage on the label tells you more than the animal does.

Protein Quality: Leucine, DIAAS and Digestion

Both meats are complete proteins, which means they supply all nine essential amino acids your body can't make. The one that matters most for muscle is leucine, the amino acid that switches on muscle protein synthesis. Per 100 grams cooked, chicken breast has 2.33 grams and lean sirloin 2.41 grams. A 150-gram portion of either clears the 2.5 to 3 grams often quoted as the leucine threshold for a meal.

Protein quality is now scored with DIAAS, the digestible indispensable amino acid score, which checks how much of each essential amino acid survives digestion. A score of 100 or more means the protein meets or beats the reference pattern. Bailey and colleagues (2020) measured beef products in pigs, a common animal model for human digestion, and found scores above 100 for ribeye roast, raw ground beef and several processed meats. Cooked ground beef fell below 100, with leucine as its limiting amino acid, and the authors concluded that overcooking may reduce how well meat protein is digested. For chicken, a lab digestion study by Hammer and colleagues (2023) scored chicken breast at 113 against the young-child reference pattern, the strictest one. Either meat is top-tier protein.

Texture changes how fast that protein arrives, but not necessarily what it builds. Pennings and colleagues (2013) fed 10 men in their seventies 135 grams of beef as either a steak or minced beef. The minced version was digested faster: about 61% of the beef's tracer-labelled amino acid reached the blood over six hours, against 49% for steak, and the men retained more protein overall. Muscle protein synthesis over those six hours was the same. If chewing is hard or your appetite is small, ground meat of either kind gets protein in more easily.

Which Builds More Muscle, Chicken or Beef?

As far as the research can tell, neither. We found no trial that fed lifters whole chicken against whole beef for weeks and measured muscle. The closest is Sharp and colleagues (2018), who put 41 young men and women through 8 weeks of resistance training. After each workout they took 46 grams of protein from beef protein isolate, chicken protein powder, whey concentrate or a carbohydrate control.

• Lean mass rose significantly in all three protein groups: beef from 51.7 to 54.7 kg, chicken from 53.0 to 54.9 kg and whey from 52.5 to 55.0 kg. It didn't rise significantly in the control group.
• Bench press and deadlift maximums rose in all groups, and the strength gains didn't differ between them.

That's a small study of powders, about 10 people per group, so treat it as support for a simple idea rather than proof. Quality protein from either animal supports muscle growth when you train. The bigger levers are how much protein you eat across the day and how hard you train. Our guide to how much protein per day covers the daily targets, and the portion per meal matters too.

Robinson and colleagues (2013) fed 35 men around 59 years old 0, 57, 113 or 170 grams of 85% lean ground beef. Only the 170-gram serving, about 36 grams of protein, raised muscle protein synthesis above the smaller doses, both at rest and after resistance exercise. Those men were middle-aged, and younger lifters may respond to somewhat less, but a palm-to-hand-sized portion of either meat is a sensible target for a main meal.

Protein only builds muscle you ask for with training. If you're building strength at home, our roundup of the best strength training apps compares the options. In FitCraft, a 3D AI coach demonstrates each exercise with interactive 3D models, says your name as you train and adapts your dumbbell and bodyweight workouts as you progress, with streaks and leaderboards to keep you coming back between grocery runs.

Iron, Zinc, B12 and Creatine: Where Beef Pulls Ahead

Beef's real advantage is micronutrients. Compared with chicken breast, 100 grams of cooked lean beef gives you:

• Vitamin B12: 1.9 to 2.8 micrograms against 0.34. A 100-gram serving of ground beef covers more than the full adult Daily Value of 2.4 micrograms, and chicken breast covers about a seventh of it.
• Zinc: 5.8 to 7.0 milligrams against 1.0, which is half or more of the 11-milligram Daily Value.
• Iron: 2.1 to 3.2 milligrams against 1.0. Most of beef's iron is heme iron, the form your gut absorbs most readily. Purchas and colleagues (2006) measured 88% of the iron in raw beef loin as heme iron.

That matters most for people who run low. Women aged 19 to 50 have the highest iron needs, 18 milligrams a day, and plant-heavy eaters, older adults and endurance athletes often fall short on iron, zinc or B12. Chicken holds its own elsewhere: per 100 grams, breast has 13.7 milligrams of niacin against 8.9 in sirloin, and similar vitamin B6 and selenium. Dark chicken meat closes some of the mineral gap, with almost twice the zinc of breast.

Creatine is the surprise. Beef has a reputation as the creatine meat, but Harris and colleagues (1997) measured about 30 mmol of creatine per kilogram in uncooked chicken and uncooked beef alike. That's roughly 0.4 grams per 100 grams of raw meat. Cooking lowers it: Purchas and colleagues (2004) found slow cooking significantly cut creatine in red meat as part of it turned into creatinine. So a typical 3 to 5 gram creatine supplement serving equals more than a kilogram of raw meat of either kind. Neither meat replaces the supplement if that's what you're after.

Chicken vs Beef for Weight Loss

When calories are tight, protein per calorie is the number to watch, because protein keeps you full and helps you hold on to muscle while you lose fat. Per 100 calories of cooked meat:

• Chicken breast: 18.8 grams of protein
• Top sirloin, lean: 16.1 grams
• Chicken thigh and 93% lean ground beef: 13.8 grams each
• Ribeye, lean: 12.7 grams
• Ground chicken: 12.3 grams
• 85% lean ground beef: 10.8 grams
• 80% lean ground beef: 9.9 grams

Skinless chicken breast is the clear winner, and that's why it dominates diet plans. Lean beef isn't far behind, though. Sirloin, eye of round and 93% lean mince fit a calorie deficit without trouble. The fattier ground beefs are where the calories pile up: swapping 150 grams of cooked 80% lean ground beef for chicken breast saves about 160 calories with no loss of protein.

Cooking matters as much as the cut. Breaded, fried or skin-on chicken can carry more calories than a lean steak, so grill, roast, poach or air-fry, and drain the fat from browned mince.

Which Is Better for Bulking, Chicken or Ground Beef?

Ground beef makes a surplus easier. A 100-gram serving of cooked 80% lean ground beef has 272 calories against 165 for chicken breast, with nearly the same protein. When appetite is the thing holding back your gains, denser food helps, and beef brings the iron and zinc a heavy training block uses.

Bulking doesn't mean eating as much as possible, though. Most lifters do better adding a modest surplus so most of the gain is muscle, as our guide to what a lean bulk is explains. Chicken thighs and 85% to 90% lean ground beef sit in the middle and keep the extra calories in check.

Is Chicken Better for You Than Red Meat?

For cholesterol, the best trial says no difference. In the APPROACH trial, Bergeron and colleagues (2019) fed 113 healthy adults diets with protein mostly from red meat, white meat (poultry) or plant foods for four weeks each, on either a high or low saturated fat background. LDL cholesterol and apolipoprotein B were higher on both meat diets than on the plant diet, and red and white meat didn't differ. Saturated fat raised LDL whatever the protein source.

Long-term studies point the same mild way. Zhong and colleagues (2020) pooled six US cohorts with 29,682 adults followed for a median of 19 years. Each extra two servings a week was linked to a 7% higher risk of cardiovascular disease for processed meat, 3% for unprocessed red meat and 4% for poultry. Unprocessed red meat and processed meat were also linked to a 3% higher risk of death from any cause, while poultry wasn't. These are observational links, and the absolute risk differences over 30 years ranged from about 0.6 to 1.7 percentage points.

Cancer is where red meat and processed meat separate from chicken. The International Agency for Research on Cancer (Bouvard and colleagues, 2015) classified processed meat as carcinogenic to humans, estimating that each 50 grams eaten daily raises colorectal cancer risk by about 18%. It classed red meat as probably carcinogenic on more limited evidence, with a possible 17% higher risk for each 100 grams a day if the link is causal. Poultry wasn't evaluated. The classification describes how strong the evidence is, not how large the risk is.

A reasonable reading: unprocessed beef a few times a week is fine for most people, and processed meat is the part to cut. The World Cancer Research Fund suggests that if you eat red meat, you keep it to about three portions a week, roughly 350 to 500 grams cooked, and eat very little, if any, processed meat. Remember that processed meat includes chicken nuggets, deli turkey and chicken sausages too.

Cost per Gram of Protein: Chicken vs Beef

Chicken breast is the cheaper protein by a wide margin. We combined US Bureau of Labor Statistics average retail prices for September 2026 (BLS average price data) with USDA protein values for the raw meat, since prices are per raw pound.

Raw protein per 100 g from USDA FoodData Central: chicken breast 22.5 g, 80/20 ground beef 17.2 g, top sirloin with 1/8-inch fat trim 19.9 g. BLS doesn't state the fat percentage of its ground beef, so 80/20 is an assumption. Leaner blends cost more per pound but carry more protein.

So 30 grams of protein costs roughly twice as much from ground beef as from chicken breast, and nearly four times as much from sirloin. Chicken thighs, whole chickens and family packs usually cost less again, and buying beef on sale and freezing it narrows the gap. If your budget is tight and protein is the goal, chicken does the heavy lifting and beef can be the twice-a-week upgrade.

How to Use Chicken and Beef in Your Week

You don't have to pick a side. For most people who train at home a few times a week, this split covers protein, micronutrients and budget:

• Chicken as the everyday base. Breast when calories are tight, thighs when you want more flavour and a little more zinc.
• Lean beef two or three times a week. Sirloin, round or 90% to 93% lean mince for the iron, zinc and B12.
• Hit your protein at every meal, not just dinner. Breakfast is where most people come up short, and our high-protein breakfast ideas show how to reach 30 grams without meat.
• Don't overcook it. Dry, overdone meat is harder to eat in quantity, and the beef digestion study above flagged overcooking as a likely drag on protein digestibility. Use a thermometer: 165°F (74°C) for chicken and 160°F (71°C) for ground beef.
• Keep processed meat occasional, whichever animal it comes from.

The Bottom Line

On protein alone, chicken and beef are close to a tie: about 27 to 31 grams per 100 grams cooked for lean cuts, with similar leucine and top-tier protein quality. Chicken breast wins on calories, saturated fat and price. Beef wins on iron, zinc and B12, and neither meat holds enough creatine to replace a supplement.

Build most meals on chicken, add lean beef a few times a week, skip the processed stuff, and put your effort into hitting your daily protein and training consistently. The muscle comes from the work, and the meat just supplies the material.