The amount of protein you need depends on a few key factors, including your weight and goals. If you simply want to maintain your current weight, health status, and activity level, the recommended dietary allowance (RDA) for protein equals 0.8g for every kilogram you weigh. For example, if you weigh 150lbs or about 68kg, your RDA is about 55g of protein. In many cases, you can consume your RDA for protein by eating whole foods like lean meats, fish, eggs, and beans. However, the standard RDA for protein isn't enough for many people. If you have a highly active lifestyle, if you want to gain muscle mass, or if you want to maintain weight loss, then consuming more protein could help. Relying on protein supplements can ensure you get the macronutrients you need without unnecessary calories.