Whey protein powder is a popular supplement that is used to increase protein intake and support muscle growth and recovery. It can be used in a variety of ways, including mixing it with water, milk, or other liquids to create a protein shake or smoothie, adding it to baked goods and other recipes, or using it as an ingredient in pre-made protein bars and snacks. It is important to note that some people may have lactose intolerance or other food sensitivities to dairy-based products such as whey, so it is important to consider your individual dietary needs before using whey protein powder.