Protein in Legumes: Chickpeas, Lentils & Beans Compared to Meat
The "Incomplete Protein" Myth, Revisited
For decades, the theory that plant proteins are "incomplete" and must be combined in the same meal to be useful dominated nutrition guidance. This has been debunked. The liver maintains a pool of essential amino acids throughout the day. As long as you eat a variety of plant proteins over the course of a day, you receive all essential amino acids.
Protein Per 100g (Cooked)
| Food | Protein (g) | Calories |
|---|---|---|
| Chicken Breast (grilled) | 31g | 165 |
| Canned Tuna | 26g | 128 |
| Edamame | 11g | 121 |
| Lentils (cooked) | 9g | 116 |
| Chickpeas (cooked) | 9g | 164 |
| Black Beans (cooked) | 8.9g | 132 |
Digestibility: The DIAAS Score
Raw protein quantity doesn't tell the full story. The Digestible Indispensable Amino Acid Score (DIAAS) measures actual protein quality utilization. Chicken scores ~1.08 (excellent). Lentils score ~0.53 (moderate). However, combining lentils with rice boosts the combined DIAAS to ~0.80 — close to animal protein.
Cost Comparison
Per 20g of protein:
- Canned chickpeas: ~$0.35
- Dried lentils: ~$0.20
- Chicken breast: ~$1.20
- Beef (lean): ~$2.50
Using RecipeCalc for Plant-Protein Recipes
RecipeCalc shows the full amino acid breakdown for any recipe — including whether your plant-based meal provides limiting amino acids like lysine and methionine. Build your legume-based recipe, check the protein profile, and optimize with complementary ingredients.
