High quality night/slow protein.
Slow proteins enter the bloodstream more slowly and have a weaker anabolic (building) effect than fast proteins, because they accelerate muscle protein synthesis to a lesser extent. They stay in the blood for up to 7 hours and therefore exhibit an anti-catabolic effect, i.e. they suppress the processes of muscle breakdown for a longer time than fast proteins. Since long-term muscle growth does not depend only on muscle protein synthesis, but is the result of the processes of building and breaking down muscle tissue, the supply of fast protein for growth and slow protein for muscle protection is of great importance.
Because slow proteins saturate you longer than fast types, they are an ideal fat loss aid during a diet.