In order to estimate a person's protein requirements you must know their?

To estimate a person's protein requirements, you must know their age, sex, weight, and activity level. Additionally, specific health conditions or goals, such as muscle gain or weight loss, can also influence protein needs. Generally, the recommended dietary allowance (RDA) for protein is about 0.8 grams per kilogram of body weight for the average adult, but this can vary based on individual circumstances.