Protein intake refers to the amount of protein that is consumed by an individual as part of their diet. Proteins are essential nutrients that are needed by the body for various functions, including building and repairing tissues, maintaining muscle mass, and supporting immune function. Research in this area often focuses on determining the optimal amount of protein that individuals should consume to meet their specific dietary needs, as well as the potential health effects of inadequate or excessive protein intake. Additionally, researchers may also explore the sources of protein, such as plant-based or animal-based sources, and how they may impact health outcomes.