Exercising causes microscopic damage to your muscles. Research has proven time and time again that high protein diets that include high quality protein sources, such as whey protein, consistently results in an increase in your body's ability to recover, repair, and grow following a training session.
Whey is a complete protein with an abundance of amino acids, and in particular, it is high in the amino acid leucine. Leucine is a key player in muscle protein synthesis initiation, which is really important in building muscle, fat loss and weight management.
Research suggests that consuming 1.5-1.8g of protein per kilogram of body weight per day alongside a regular training programme can help help build lean muscle, lose fat and improve recovery.