Dietary protein intake refers to the amount and type of proteins consumed through food sources in a person's diet. Protein is an essential macronutrient that plays many important roles in the body, including building and repairing tissues, enzyme production, hormone synthesis, and energy metabolism. Adequate protein intake is necessary for maintaining overall health, growth, and development, as well as supporting physical activity levels. The recommended daily allowance (RDA) of dietary protein varies depending on age, sex, weight, and level of physical activity, but generally ranges from 0.8 to 1 grams per kilogram of body weight per day for adults.