Whey protein has long been the benchmark ingredient for sports nutrition. Athletes choose whey protein for its well-established muscle building capabilities. However, with sports nutrition moving mainstream, elite performers now seek differentiated products to deliver more specific physiological benefits. New evidence is emerging, proving the link between whey protein and other, more diverse bioactivities that are valuable in supporting athletic performance. This white paper discusses the scientific evidence demonstrating the ability of hydrolysed whey protein to improve physiological adaptation to training as well as offering additional potential health benefits to athletes.