12 Foods That Help You Build Lean Muscle Fast

5. Shrimp

Most of the calories in shrimp come from protein and very few from fat. In addition, shrimp contain significant levels of the amino acid leucine needed for muscle development.

6. Leafy Greens

Magnesium, needed for regulating muscle function, is found in dark leafy greens such as spinach, Swiss chard, and kale.