Protein is essential to the development and maintenance of every cell in the body. Even though protein-deficient diets are rare in North America, a high-quality protein supplement can be beneficial for athletes and active individuals, growing teens, seniors, and people watching their weight. Athletes want a source of protein that is metabolized into muscle tissue. People who want to lose weight need protein that provides a steady, long-lasting supply of energy, suppresses appetite and food cravings, and slows the blood sugar highs and lows caused by some carbohydrates. Whey Protein Isolate can help older people limit muscle loss over time and support bone density. It is also an excellent low-fat and low-carbohydrate source of additional body-building protein and an energy booster for growing teenagers.