What role does protein play in livestock nutrition?

The primary role of protein in livestock nutrition is its necessity for growth and tissue repair. Proteins are made up of amino acids, which are the building blocks required for constructing new tissues, such as muscle and organs, as well as for repairing damaged tissues. Young, growing animals have heightened protein requirements due to rapid growth rates, while adult animals require adequate protein for maintenance, tissue turnover, and healing.

While protein can contribute to energy production, it is not the primary function; animals primarily derive energy from carbohydrates and fats. Protein's role extends well beyond lactation, as all life stages and conditions, including growth, maintenance, and reproduction, depend on adequate protein intake. Although protein does influence reproductive performance, this is part of its broader role in overall animal health and growth rather than being an isolated function. Thus, the assertion that protein is necessary for growth and tissue repair best encapsulates its vital role in livestock nutrition.