| Option | Pros | Cons | Best For |
|---|---|---|---|
| Chicken Breast (100g) | 31g protein. Complete amino acids. 2.3g leucine (mTOR trigger). Heme iron (1mg). B12 (0.34μg). Zero carbs. | No fiber. Higher environmental impact. Antibiotic concerns (choose organic). Cholesterol (73mg). | Maximum muscle protein synthesis. Leanest complete protein. |
| Firm Tofu (100g) | 8g protein. Complete amino acids (soy is only complete plant protein). Calcium (350mg — set with calcium sulfate). Isoflavones (heart + bone health). Fiber. Zero cholesterol. | Lower protein (1/4 chicken). Lower leucine (0.7g vs 2.3g). Phytates (soak/ferment for minerals). GMO concerns (choose organic). | Plant-based eaters. Calcium seekers. Those watching cholesterol. Environmental choice. |
Verdict
Chicken has 4x more protein and much higher leucine (critical for muscle). Tofu offers fiber, calcium, and isoflavones with no cholesterol. Both are complete proteins. Healthiest approach: eat both — chicken for muscle days, tofu for variety and plant diversity.