Plant · legume
Kidney Beans (boiled)
Kidney Beans (boiled) provides 8.6 g of protein per 100 g (10.3 g per typical serving).
8.6gprotein / 100 g
- Per serving
- 10.3 g (1/2 cup · 120 g)
- Calories
- 127 kcal / 100 g
- Protein density
- 6.8 g / 100 kcal
PDCAAS
0.65
Scale 0–1 (capped at 1.0)
DIAAS
53%
Moderate quality
Leucine
0.7 g
0.84 g per serving
Digestion
Medium
Best: Anytime
Limiting amino acid
Methionine
Pair it to complete the profile
Nutrition per 100 g
- Protein 8.6 g 26% kcal
- Fat 0.5 g 3% kcal
- Carbs 22.8 g 71% kcal
| Calories | 127 kcal |
|---|---|
| Leucine | 700 mg (8.1% of protein) |
| Lysine | 650 mg |
| Typical serving | 1/2 cup (120 g) |
Leucine threshold
About 2.5–3 g of leucine per meal maximally switches on muscle protein synthesis.
2.5 g
One serving (1/2 cup) = 0.84 g leucine
About 3 servings reach the threshold, or combine with a leucine-rich food.
Pair it with
- Rice, oats or whole-grain breadGrains supply the methionine legumes and fruits lack.
- Sesame, sunflower or hemp seedsSeeds are rich in sulfur amino acids.
- Eggs or dairy (if vegetarian)Complete proteins fill every gap.
Cost & footprint
- Cost per gram of protein
- $0.011
- Cost for 30 g protein
- ≈ $0.33
- Carbon footprint
- 1.4 kg CO₂e / kg
LowHigh
US retail estimates; prices and emissions vary by region and producer.