Proteins are necessary for muscular growth. Consider proteins to be the building blocks of your muscles. One of three macronutrients required for muscle mass growth. It is most typically found in animal products, but it can also be found in nuts and other sources. Molecules that are large and complicated and play a variety of important tasks in the body. They are essential for the structure, function, and control of the body’s tissues and organs, and they do the majority of their activity in cells. Long strands of amino acids make up protein. Each protein’s structure and function are determined by the amino acid sequence.