Protein powder, as the name implies, is a protein-rich powder, depending on the process, there are protein powders of animal and plant origin. For example, most of the animal-based ones are made from milk, such as whey protein powder, which is the supernatant of milk, and after it is extracted, the protein contained in the whey is made into a powder after the process, which is from animal-based ones. Some protein powder is plant-based food as raw materials, such as the most common is the soybean as raw materials, the soybean protein extracted through the process, processed into a powder is soy protein powder. So protein powder is a protein-rich preparation, either from animal or plant sources, and its role is mainly to replenish protein for our bodies.