20 Foods High in Leucine for Muscle and Metabolism

Leucine is an essential branched-chain amino acid, which means your body cannot make it and has to get it from food. According to Harvard Health Publishing’s protein guide, animal foods supply all nine essential amino acids, while most plant foods are low in at least one, with soybeans, buckwheat, and quinoa as notable exceptions. Leucine is the most abundant branched-chain amino acid in both animal and plant proteins, and a review of leucine in growth and development lists meat, chicken, fish, eggs, and dairy among the richest sources.

Leucine matters because it acts as a signal for muscle building. A review of leucine for retaining lean mass explains that leucine stimulates the mTOR pathway, which starts protein synthesis in muscle cells, and that several studies suggest it may help preserve lean mass on a calorie-restricted diet. It is not a magic ingredient on its own, though. A review of branched-chain amino acids in humans concludes that the other essential amino acids are needed for a full muscle-building response, which is why whole foods beat isolated supplements. This guide ranks 20 foods by the leucine you actually get in a normal serving, and it pairs well with the broader guide to foods high in BCAAs.

Best Food Sources of Leucine, Ranked by Serving Size

Jump to: Cottage Cheese | Beef Sirloin | Chicken Breast | Pork Loin | Yellowfin Tuna | Firm Tofu | Lean Ground Beef | Shrimp | Turkey Breast | Cod | Salmon | Lentils | Tempeh | Edamame | Eggs | Chickpeas | Parmesan | Greek Yogurt | Milk | Pumpkin Seeds | FAQ

All leucine, protein, and calorie figures below come from The USDA FoodData Central database (SR Legacy), calculated for the serving size shown. For a 70 kg (154 lb) adult, the U.S. National Academies’ 2005 recommendation of 42 mg of leucine per kg of body weight works out to about 2.9 g per day, which is the benchmark used for the percentages in this guide. A review of U.S. protein and amino acid recommendations argues that these figures may deserve a fresh look, so treat them as a reference point and not a ceiling.

1. Cottage Cheese: The Highest Leucine Per Serving

One cup of 2% cottage cheese delivers about 2.4 g of leucine and roughly 24 g of protein, according to The USDA, which puts it at the top of this ranking for a single serving. That is around 80% of the daily leucine figure for a 70 kg adult.

Dairy protein is a combination of casein and whey, and casein digests more slowly than whey. A cup also fits easily into a breakfast or an evening snack. Check the label, because sodium and added ingredients vary by brand.

Best eaten: topped with berries, sliced tomatoes, or a spoonful of chopped nuts.

2. Beef Sirloin: Lean Red Meat With Dense Leucine

A 3 oz portion of broiled top sirloin, trimmed of fat, provides about 2.1 g of leucine and 26 g of protein for roughly 156 calories. Beef is one of the most concentrated leucine sources in the food supply.

Choosing lean cuts keeps saturated fat and calories moderate while still delivering the amino acid. Sirloin also brings iron, zinc, and vitamin B12, which makes it a useful food for anyone building meals around muscle maintenance.

Best eaten: sliced thin over a salad or a grain bowl with plenty of vegetables.

3. Chicken Breast: The Everyday Leucine Standard

Three ounces of roasted skinless chicken breast supply about 2.0 g of leucine and 26 g of protein for roughly 140 calories. It is hard to find a more practical combination of leucine, protein, and low fat.

Chicken breast is also easy to batch cook, which makes it a dependable base for weekday lunches. Roasting, poaching, or grilling all keep the added fat low.

Best eaten: shredded into soups, wraps, or meal prep containers with vegetables and whole grains.

4. Pork Loin: A Lean Cut That Often Gets Overlooked

A 3 oz serving of roasted pork loin, lean only, provides about 1.95 g of leucine and 24 g of protein for around 178 calories. The leucine content is close to chicken and beef.

Pork loin and tenderloin are the leaner cuts, while bacon and sausage are a different nutritional category entirely. Trim visible fat and keep portions near 3 to 4 oz to balance calories.

Best eaten: roasted and sliced with roasted vegetables or a side of beans.

5. Yellowfin Tuna: High Leucine With Few Calories

A 3 oz portion of cooked yellowfin tuna delivers about 1.9 g of leucine and nearly 25 g of protein for only about 110 calories. That is one of the best leucine-to-calorie ratios on this list.

Canned light tuna in water also contributes, and USDA lists it at roughly 1.5 to 2.1 g of leucine per 100 g depending on the product entry. Varying tuna with other fish keeps your intake of mercury and other contaminants in check.

Best eaten: seared and sliced, or mixed into a bean salad with olive oil and lemon.

6. Firm Tofu: The Top Plant Source Per Serving

Half a cup of raw firm tofu made with calcium sulfate provides about 1.75 g of leucine and nearly 22 g of protein. Per serving, it outranks every other plant food in this guide.

Soybeans are one of the few plant foods that supply all nine essential amino acids, which makes tofu a practical anchor for vegetarian and vegan meals. Pressing the block before cooking gives it a firmer texture.

Best eaten: pressed and pan-seared, or cubed into stir-fries and soups.

7. Lean Ground Beef: A Flexible Leucine Option

A 3 oz broiled patty of 90% lean ground beef provides about 1.7 g of leucine and 22 g of protein for roughly 184 calories. The 90% lean grade keeps the fat lower than regular ground beef.

Ground beef is easy to portion into tacos, chili, and bowls. Pairing it with beans or lentils stretches the meat and adds fiber.

Best eaten: browned with onions and tomatoes, then stirred into a lentil or bean chili.

8. Shrimp: Low-Calorie Seafood With Solid Leucine

Three ounces of cooked shrimp provide about 1.66 g of leucine and 19 g of protein for roughly 101 calories. Few foods deliver this much leucine for so few calories.

Shrimp cooks in minutes, which suits busy evenings. USDA data for the breaded and fried version shows a lower leucine amount per gram and far more calories, so plain preparations are the better choice.

Best eaten: sauteed with garlic and vegetables, or chilled over a salad.

9. Turkey Breast: Lean Poultry Beyond Thanksgiving

A 3 oz serving of roasted turkey breast, meat only, provides about 1.6 g of leucine and nearly 26 g of protein for roughly 125 calories. Its protein content per ounce is among the highest on this list.

Plain roasted turkey breast is very lean. Deli versions and pre-basted birds can contain added solutions and extra sodium, so plain roasted meat from a whole breast is the better choice.

Best eaten: sliced into sandwiches on whole grain bread or cubed into soups.

10. Cod: Mild White Fish With Reliable Leucine

A 3 oz portion of cooked Atlantic cod supplies about 1.6 g of leucine and 19 g of protein for only about 89 calories. It is one of the lowest-calorie ways to reach a meaningful leucine amount.

Cod has a mild flavor that suits baking, steaming, and pan cooking. It is a good choice if you want a lean fish without the stronger taste of oily fish.

Best eaten: baked with lemon, herbs, and a side of roasted vegetables.

11. Salmon: Leucine Plus Omega-3 Fats

A 3 oz portion of cooked farmed Atlantic salmon provides about 1.5 g of leucine and nearly 19 g of protein for roughly 175 calories. The higher calorie count reflects its healthy fat content.

Salmon pairs leucine with omega-3 fatty acids, which makes it a useful food when you want more than one benefit from a single serving.

Best eaten: baked or pan-seared with a side of leafy greens or whole grains.

12. Lentils: Leucine With Fiber

A cup of boiled lentils provides about 1.3 g of leucine and nearly 18 g of protein for about 230 calories. That is a strong plant-based amount for a single cup, and it comes with plenty of fiber.

Lentils cook faster than most dried beans and do not require soaking. Their leucine concentration per gram is lower than meat, so a full cup or more per meal is what makes the numbers work.

Best eaten: in soups, stews, or cold salads with a splash of vinegar.

13. Tempeh: Fermented Soy With Firm Texture

A 3 oz serving of tempeh provides about 1.2 g of leucine and 17 g of protein for roughly 163 calories. It is made from whole fermented soybeans, so it keeps more of the bean intact than tofu.

Tempeh has a nutty flavor and a dense texture that holds up in stir-fries and sandwiches. Steaming it for a few minutes before cooking can soften any bitterness.

Best eaten: sliced and pan-fried, or crumbled into tacos and grain bowls.

14. Edamame: A Snackable Soy Source

A cup of prepared edamame provides about 1.15 g of leucine and nearly 19 g of protein for roughly 188 calories. Because it is soy, it supplies a full set of essential amino acids.

Edamame works as a snack, a salad topper, or a side dish. Buying it frozen and shelled makes it one of the easiest plant proteins to keep on hand.

Best eaten: steamed with a pinch of salt or tossed into salads and rice bowls.

15. Eggs: Complete Protein in a Small Package

Two large hard-boiled eggs provide about 1.1 g of leucine and nearly 13 g of protein for about 155 calories. Eggs are a complete protein and one of the easiest foods to prepare ahead.

Because a typical egg serving is small, eggs work best as part of a meal that also includes other protein sources. Pairing eggs with cottage cheese or beans raises the total quickly.

Best eaten: hard-boiled for snacks, or scrambled with vegetables at breakfast.

16. Chickpeas: Everyday Legume Leucine

A cup of boiled chickpeas provides about 1.0 g of leucine and nearly 15 g of protein for roughly 269 calories. Chickpeas bring fiber and slow-digesting carbohydrates along with their protein.

Chickpeas are lower in leucine per calorie than animal foods, so they work best alongside other protein sources like tofu, yogurt, or whole grains. They are also one of the most versatile pantry staples.

Best eaten: roasted until crunchy, blended into hummus, or added to salads and curries.

17. Parmesan: Small Serving, Big Leucine Density

A single ounce of Parmesan provides about 0.97 g of leucine and 10 g of protein for roughly 110 calories. Per gram, it has more leucine than any other food in this guide.

Because cheese is calorie dense and typically salty, a small amount goes a long way. Grating it over meals adds leucine and flavor without a large portion.

Best eaten: grated over soups, salads, roasted vegetables, or whole grain pasta.

18. Greek Yogurt: Creamy Leucine for Breakfast

A 170 g container of plain lowfat Greek yogurt provides about 0.9 g of leucine and 17 g of protein for about 124 calories. It is a convenient way to build leucine into the first meal of the day.

Plain varieties let you control added sugar, and the USDA entries for flavored Greek yogurts show lower protein and leucine per gram. Stir in fruit and nuts rather than buying sweetened cups.

Best eaten: topped with berries, seeds, and a drizzle of honey if desired.

19. Milk: A Simple Leucine Contributor

A cup of 2% milk provides about 0.77 g of leucine and 8 g of protein for about 122 calories. It does not top the list, but it is easy to add to cereal, smoothies, and coffee.

Milk protein is mostly casein with a smaller share of whey. If you avoid dairy, fortified soy milk is the closest plant-based alternative in protein, though its leucine content differs from cow’s milk.

Best eaten: in smoothies, oatmeal, or as a standalone drink with a meal.

20. Pumpkin Seeds: The Leucine-Rich Seed

An ounce of dried pumpkin seed kernels provides about 0.68 g of leucine and 8.5 g of protein for roughly 157 calories. Pumpkin seeds have more leucine per gram than peanuts, sunflower seeds, or almonds in the USDA database.

Seeds are calorie dense, so the serving size is small. A handful sprinkled over yogurt or salads adds crunch and a little leucine without much volume.

Best eaten: sprinkled over oatmeal, salads, or yogurt, or eaten as a snack.

Quick Reference: All 20 Leucine Foods at a Glance

5 Evidence-Based Tips for Getting More Leucine From Food

• Spread protein across your meals. Harvard Health advises spreading protein through the day instead of eating most of it at dinner, which also spreads your leucine intake. The guide to 40 high-protein foods has more ideas for each meal.
• Combine plant proteins across the day. Soybeans and quinoa supply all nine essential amino acids, and eating a variety of legumes, grains, nuts, and seeds covers the rest. Tofu, tempeh, and edamame lead the plant foods on this list.
• Choose whole foods before supplements. The growth review cited earlier describes a six-week trial in which participants took 2.5 g of leucine three times daily, but supplement decisions belong with a doctor or dietitian, especially if you have kidney or liver conditions.
• Pair protein with strength training. Muscles use the protein you eat when you give them a reason to. The list of foods that are good for muscles covers pre- and post-workout choices.
• Watch calories in dense foods. Pumpkin seeds, Parmesan, and fatty cuts of meat pack more calories per gram of leucine than cod, shrimp, or tuna, so portion size matters if weight loss is the goal.

Frequently Asked Questions About Leucine

How much leucine do you need per day?

The U.S. National Academies’ 2005 recommendation is 42 mg per kg of body weight per day, which is about 2.9 g for a 70 kg adult. A registered dietitian can help you set a target that fits your situation.

Can vegetarians and vegans get enough leucine?

Yes, with planning. Firm tofu, lentils, tempeh, edamame, and chickpeas in this guide provide between about 1.0 and 1.75 g of leucine per serving. Because plant foods are less leucine-dense than meat, larger portions and a mix of sources across the day make the numbers work.

Does leucine help with weight loss?

Research suggests leucine may help preserve lean mass during calorie restriction, and a review of leucine and lipid metabolism points to possible benefits for glucose tolerance and insulin sensitivity. That review also notes that much uncertainty remains, so results in people are not settled.

Is more leucine always better?

No. The review of branched-chain amino acids cited above found that leucine alone does not produce the full muscle-building response, because your body also needs the other essential amino acids. The guides to foods high in lysine and foods high in threonine cover two of them.

Do you need a leucine supplement?

The foods in this guide can supply the daily reference figure on their own. A cup of cottage cheese plus a serving of chicken, for example, covers well over the 2.9 g benchmark. Talk to a healthcare provider before adding supplements.

The Bottom Line

Cottage cheese, lean beef, chicken, pork, and tuna lead the list for leucine per serving, with firm tofu as the best plant option. You do not need a supplement to reach the daily reference figure, and you do not need to eat meat at every meal either. Build each meal around a solid protein source, spread those meals across the day, and use the table above to swap foods that fit your diet.

Nutrient values in this article are from the USDA FoodData Central database (SR Legacy) and are calculated for the serving sizes listed. Actual values vary by brand, cut, and preparation.

This article is for educational purposes and is not a substitute for advice from a registered dietitian or physician. Talk to a healthcare professional before changing your diet or taking supplements, especially if you have kidney disease, liver disease, or another medical condition.

Save It For Later