Protein sources compared

Not All Protein Is Equal: A Complete Comparison of Every Major Protein Source

Chicken breast and lentils can both give you 25 grams of protein. But your body will not use them the same way.

This guide ranks major protein sources across quality, density, cost, and satiety, then translates the numbers into the best choice for muscle gain, fat loss, plant-based eating, convenience, and budget.

Same grams, different usability

Chicken Breast

25g protein target

Quality: 0.92
Calories / 100g: 165
Leucine threshold: 28g protein

Lentils

25g protein target

Quality: 0.52
Calories / 100g: 116
Leucine threshold: 42g protein

Goal-based ranking

What is your primary goal?

Top 5 for Muscle

Quality, leucine, and practical serving size

Live ranking

Whole Eggs

13g protein / 100g · $0.25 per 10g protein

9.4/10

Whey Protein Powder

80g protein / 100g · $0.30 per 10g protein

9.3/10

Salmon

25g protein / 100g · $0.80 per 10g protein

9.2/10

Canned Tuna

26g protein / 100g · $0.20 per 10g protein

9.1/10

Chicken Breast

31g protein / 100g · $0.35 per 10g protein

9.0/10

Four-dimensional score

Protein quality is not one number

This guide scores protein sources across quality, density, value, and satiety. That is why a food can be excellent for muscle-building but poor for budget, or cheap but incomplete unless paired.

Quality

PDCAAS/DIAAS

Amino acid completeness and digestibility. This is the difference between protein eaten and protein your body can use.

Density

g protein / 100 kcal

How much protein you get before calories climb. This matters most during fat loss.

Value

$ / 10g protein

A practical cost benchmark for making high protein intake sustainable over months.

Satiety

fullness score

A mix of protein, food volume, fiber, and how well a source works as a real meal.

Complete database

Protein sources compared

Cost values are planning estimates. Use them for relative comparison, then update with your local grocery prices.

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Whole Eggs

Animal

9.4

Protein: 13g / 100g
Calories: 155
Cost: $0.25 / 10g
Density: 8.4g / 100 kcal

Whey Protein Powder

Supplement

9.3

Protein: 80g / 100g
Calories: 400
Cost: $0.30 / 10g
Density: 20g / 100 kcal

Salmon

Animal

9.2

Protein: 25g / 100g
Calories: 208
Cost: $0.80 / 10g
Density: 12g / 100 kcal

Canned Tuna

Animal

9.1

Protein: 26g / 100g
Calories: 116
Cost: $0.20 / 10g
Density: 22.4g / 100 kcal

Chicken Breast

Animal

9.0

Protein: 31g / 100g
Calories: 165
Cost: $0.35 / 10g
Density: 18.8g / 100 kcal

Greek Yogurt (0%)

Dairy

8.8

Protein: 10g / 100g
Calories: 59
Cost: $0.40 / 10g
Density: 16.9g / 100 kcal

Turkey Breast

Animal

8.7

Protein: 29g / 100g
Calories: 135
Cost: $0.40 / 10g
Density: 21.5g / 100 kcal

Lean Beef (95%)

Animal

8.7

Protein: 26g / 100g
Calories: 152
Cost: $0.60 / 10g
Density: 17.1g / 100 kcal

Low-Fat Cottage Cheese

Dairy

8.6

Protein: 11g / 100g
Calories: 72
Cost: $0.30 / 10g
Density: 15.3g / 100 kcal

Shrimp

Animal

8.5

Protein: 24g / 100g
Calories: 99
Cost: $0.55 / 10g
Density: 24.2g / 100 kcal

Pea + Rice Protein Blend

Plant blend

8.3

Protein: 78g / 100g
Calories: 390
Cost: $0.38 / 10g
Density: 20g / 100 kcal

Pea Protein Powder

Plant

8.0

Protein: 80g / 100g
Calories: 380
Cost: $0.35 / 10g
Density: 21.1g / 100 kcal

Firm Tofu

Plant

7.8

Protein: 17g / 100g
Calories: 144
Cost: $0.20 / 10g
Density: 11.8g / 100 kcal

Tempeh

Plant

7.7

Protein: 19g / 100g
Calories: 193
Cost: $0.35 / 10g
Density: 9.8g / 100 kcal

Edamame

Plant

7.6

Protein: 11g / 100g
Calories: 121
Cost: $0.25 / 10g
Density: 9.1g / 100 kcal

Quinoa

Plant

7.5

Protein: 4g / 100g
Calories: 120
Cost: $0.45 / 10g
Density: 3.3g / 100 kcal

Chickpeas

Plant

7.1

Protein: 9g / 100g
Calories: 164
Cost: $0.12 / 10g
Density: 5.5g / 100 kcal

Black Beans

Plant

7.0

Protein: 9g / 100g
Calories: 132
Cost: $0.10 / 10g
Density: 6.8g / 100 kcal

Soy Milk

Plant

6.9

Protein: 3g / 100g
Calories: 54
Cost: $0.30 / 10g
Density: 5.6g / 100 kcal

Lentils

Plant

6.8

Protein: 9g / 100g
Calories: 116
Cost: $0.08 / 10g
Density: 7.8g / 100 kcal

Hemp Seeds

Plant

6.5

Protein: 31g / 100g
Calories: 553
Cost: $0.60 / 10g
Density: 5.6g / 100 kcal

Food	Protein / 100g	PDCAAS	Calories	Cost / 10g	Density	Score
Whole Eggs Animal	13g	1.00	155	$0.25	8.4	9.4
Whey Protein Powder Supplement	80g	1.00	400	$0.30	20	9.3
Salmon Animal	25g	0.94	208	$0.80	12	9.2
Canned Tuna Animal	26g	0.92	116	$0.20	22.4	9.1
Chicken Breast Animal	31g	0.92	165	$0.35	18.8	9.0
Greek Yogurt (0%) Dairy	10g	1.00	59	$0.40	16.9	8.8
Turkey Breast Animal	29g	0.91	135	$0.40	21.5	8.7
Lean Beef (95%) Animal	26g	0.92	152	$0.60	17.1	8.7
Low-Fat Cottage Cheese Dairy	11g	1.00	72	$0.30	15.3	8.6
Shrimp Animal	24g	0.91	99	$0.55	24.2	8.5
Pea + Rice Protein Blend Plant blend	78g	0.98	390	$0.38	20	8.3
Pea Protein Powder Plant	80g	0.82	380	$0.35	21.1	8.0
Firm Tofu Plant	17g	0.91	144	$0.20	11.8	7.8
Tempeh Plant	19g	0.91	193	$0.35	9.8	7.7
Edamame Plant	11g	0.91	121	$0.25	9.1	7.6
Quinoa Plant	4g	0.92	120	$0.45	3.3	7.5
Chickpeas Plant	9g	0.78	164	$0.12	5.5	7.1
Black Beans Plant	9g	0.75	132	$0.10	6.8	7.0
Soy Milk Plant	3g	0.91	54	$0.30	5.6	6.9
Lentils Plant	9g	0.52	116	$0.08	7.8	6.8
Hemp Seeds Plant	31g	0.63	553	$0.60	5.6	6.5

Quality deep dive

Why eggs became the practical benchmark

Whole eggs score at the top of common protein-quality systems because they provide all nine essential amino acids in a digestible package. They are not the highest-protein food by weight, but they are one of the cleanest examples of a complete protein that also works in normal meals.

essential amino acids

1.00

PDCAAS benchmark

0.54g

leucine per egg approx.

Leucine threshold

The switch for muscle protein synthesis

Many meals need roughly 2-3g leucine to fully stimulate muscle protein synthesis. Lower-leucine sources can still work, but the serving usually needs more total protein.

Whey protein

highest leucine density

~20g protein

Whole eggs

complete whole food

~25g protein

Chicken breast

lean meal anchor

~28g protein

Soy protein

best plant baseline

~30g protein

Pea protein

often better when blended

~35g protein

Wheat protein

low lysine and leucine density

~50g protein

Digestion speed

Fast protein and slow protein solve different jobs

Whey protein

8-10 g/h

Fast post-workout supplement

Casein / cottage cheese

2-4 g/h

Slow evening protein

Egg protein

3-4 g/h

Balanced whole-food option

Chicken breast

3-4 g/h

Structured meal protein

Plant proteins

2-3 g/h

Pair and distribute across meals

Balanced comparison

Animal protein vs plant protein

Animal protein usually gives the highest short-term muscle protein synthesis signal per gram. Plant protein can still work extremely well when total protein is higher and amino acid gaps are covered.

Dimension	Animal	Plant
Amino acid completeness	Usually complete	Usually needs pairing, except soy and quinoa
Leucine density	High in whey, eggs, meat, dairy	Moderate; soy is stronger than most plants
Digestibility	Often 90-98%	Often 70-90%, depending on processing
Fiber	None	Often high in legumes, grains, seeds
Micronutrients	B12, heme iron, zinc	Magnesium, potassium, folate
Environmental impact	Often higher	Often lower

Amino acid coverage

Radar view of whey, tofu, and lentils. The shape shows why soy foods are easier to plan than most legumes.

Whey Protein PowderScore 9.3

Firm TofuScore 7.8

LentilsScore 6.8

Plant protein strategy

How to build complete plant protein days

You do not need every plant meal to be complete by itself. The practical goal is to cover the essential amino acids across the day with complementary foods.

Beans + grains

Methionine from grains, lysine from beans

black beans with rice, lentils with whole-grain flatbread

The classic pairing because legumes and grains cover each other's biggest gaps.

Legumes + seeds

Methionine and cysteine from seeds

lentil soup with pumpkin seeds, tofu bowl with sesame

Works well when you want a higher-fiber meal without relying on a large grain portion.

Soy foods alone

Soy is naturally complete enough for practical meal planning

tofu stir-fry, tempeh tacos, edamame bowls

The simplest plant-based base because tofu, tempeh, edamame, and soy milk share a strong amino acid profile.

Pea + rice protein powder

Lysine from pea, methionine from rice

mixed plant protein shake

A convenient option when a vegan athlete wants a more whey-like amino acid profile.

Budget guide

The cheapest protein is not always the best protein

Beans and lentils are extremely cheap, but they need pairing. Eggs, tuna, tofu, and cottage cheese are often the practical middle ground: affordable and easier to complete.

Lentils

$0.08

Black Beans

$0.10

Chickpeas

$0.12

Canned Tuna

$0.20

Firm Tofu

$0.20

Whole Eggs

$0.25

Edamame

$0.25

Whey Protein Powder

$0.30

Low-Fat Cottage Cheese

$0.30

Soy Milk

$0.30

Budget protein day

Target: 150g protein. This template reaches 136g for about $3.55 before local price variation.

Food	Protein	Cost
Whole eggs 4 large	26g	$0.80
Canned tuna 1 drained can	36g	$0.90
Black beans 200g cooked	18g	$0.20
Greek yogurt 200g	20g	$0.80
Rolled oats 80g	10g	$0.15
Firm tofu 150g	26g	$0.70

Add a small chicken, tofu, or extra yogurt portion to push this over 150g while staying near $4/day in many U.S. grocery contexts.

Final picks

Best protein sources by goal

Quality, leucine, and timing

Maximize muscle growth

Use whey after training when convenient, then anchor meals with eggs, chicken breast, salmon, or Greek yogurt.

See the muscle-building timeline

Density and satiety

Lose fat while keeping muscle

Prioritize chicken breast, Greek yogurt, tuna, shrimp, turkey breast, and cottage cheese.

Build a cutting diet plan

Completeness and total intake

Build muscle on plants

Build around tofu, tempeh, edamame, soy milk, and pea-rice protein, then pair legumes with grains or seeds.

Plan a high-protein week

Cost per gram and easy prep

Maximize budget efficiency

Use lentils, black beans, eggs, canned tuna, tofu, oats, and cottage cheese as the weekly base.

Calculate your TDEE first

FAQ

Protein source questions

What is the highest quality protein source?+

Eggs, whey protein, casein, and soy protein commonly score at or near the top on PDCAAS. Whey is especially useful for muscle-building because it is fast-digesting and rich in leucine.

Is plant protein as good as animal protein for building muscle?+

Plant protein can support comparable long-term muscle growth when total protein is high enough and amino acid gaps are covered. Many plant-based athletes use roughly 20-30% more total protein to offset lower leucine density and digestibility.

What is the cheapest high-protein food?+

Lentils, black beans, eggs, canned tuna, and tofu are among the most cost-effective high-protein staples. Exact prices vary by store, package size, and region.

How much protein can your body absorb in one meal?+

The body can absorb more than one meal's worth of protein, but muscle protein synthesis is usually maximized by spreading protein across several meals. A practical target is about 25-40g protein per meal for many adults.

What are complete protein sources?+

Complete proteins contain all nine essential amino acids in useful amounts. Most animal proteins are complete. Plant-based complete options include soy foods and quinoa, while many legumes and grains become stronger when paired.

Is whey protein better than chicken for building muscle?+

Whey is faster and more leucine-dense, so it is convenient after training. Chicken is better as a filling whole-food meal anchor. Both can fit the same muscle-building plan.

From choosing to planning

Know what to eat. Now calculate how much.

Once you know which protein sources fit your goal, turn that into a weekly target and a meal prep rotation.

Calculate My Daily Protein Target Build My Cutting Diet

Research note

Use the score as a decision tool, not a diagnosis.

Food data and cost estimates vary by brand, package size, preparation method, and region. The purpose is to compare protein choices, then verify your real recipe or day with the site calculators.

See How Long Muscle Takes

Data and method notes

How to read the protein source rankings

Protein quality is not just a protein-grams column. The FAO report on dietary protein quality evaluation explains why amino acid digestibility and indispensable amino acid balance matter, and why DIAAS was proposed as a more precise method than older scoring systems. This page uses PDCAAS-style values as a practical public-facing benchmark because they are still widely recognized by consumers and educators.

Food protein and calorie values are modeled from USDA-style food composition data. USDA FoodData Central is the public reference source for the type of per-100g food data used across this site. Real cooked weights, draining, brand formulas, and fortification can move the final number, so use the recipe calculator when exact batch values matter.

The muscle-building recommendations are aligned with the International Society of Sports Nutrition protein position stand, which discusses daily protein targets, protein quality, timing, and distribution for active people. For per-meal planning, the review on protein intake per meal and muscle-building is useful background for why spreading protein across meals is usually more practical than trying to eat one very large protein dose.

Cost estimates are deliberately labeled as planning estimates, not live grocery quotes. They are included because budget is a real adherence variable. If you are choosing protein sources for a household plan, update the cost-per-10g column with your actual store prices and keep the quality and density columns as the stable comparison frame.