Plant · legume
Black Beans (cooked)
Black Beans (cooked) provides 8.9 g of protein per 100 g (8.9 g per typical serving).
8.9gprotein / 100 g
- Per serving
- 8.9 g (1/2 cup · 100 g)
- Calories
- 132 kcal / 100 g
- Protein density
- 6.7 g / 100 kcal
PDCAAS
0.75
Scale 0–1 (capped at 1.0)
DIAAS
55%
Moderate quality
Leucine
0.66 g
0.66 g per serving
Digestion
Medium
Best: Anytime
Limiting amino acid
Methionine
Pair it to complete the profile
Nutrition per 100 g
- Protein 8.9 g 26% kcal
- Fat 0.5 g 3% kcal
- Carbs 23.7 g 71% kcal
| Calories | 132 kcal |
|---|---|
| Leucine | 660 mg (7.4% of protein) |
| Lysine | 600 mg |
| Typical serving | 1/2 cup (100 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) = 0.66 g leucine
About 3.8 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
- $0.010
- Cost for 30 g protein
- ≈ $0.30
- Carbon footprint
- 1.3 kg CO₂e / kg
LowHigh
US retail estimates; prices and emissions vary by region and producer.