Protein powders are dietary supplements made from various protein sources, such as whey, casein, soy, or pea. They are commonly used by athletes and fitness enthusiasts to help meet their daily protein needs, support muscle recovery, and enhance overall performance. These powders can be mixed with water, milk, or added to smoothies and baked goods. While they can be convenient for increasing protein intake, it's important to balance them with whole food sources like meat, fish, eggs, and legumes for a well-rounded diet.