Proteins are among the essential nutrients with 20 different amino acids forming their basic structure. Protein has a huge range of physiological functions that are important for physical performance and health. They are the basis for the structure of the muscles, connective tissue, enzymes and hormones. They can also be used as a source of energy under load. As the body cannot store protein, a steady supply of protein is essential. In order to provide optimal assistance in muscle gain, for example, a protein uptake of 2g protein per kilogram body weight each day is recommended. Animal products such as meat, fish and dairy products can be used as sources of protein, as well as plant-based products such as pulses and soy products. Proteins can be isolated from animal and plant-based foods, for example from milk or soy. These proteins are available in powdered form. As a delicious shake, the powders not only provide easy to prepare and consume high-quality protein, but are also still very low in fat and calories.