Investigating the Digestibility, Bioavailability and Utilisation of Varied Combined Protein Sources in Older Males Using a Dual Stable Isotope Tracer Technique

Participants receive a 20g protein feed of their randomised blend over the course of five hours split into aliquots every twenty minutes. The drink also contains a top up of 13C2 leucine stable isotope tracer, as well as uniformly labelled 13C spirulina and 2H labelled free amino acids for quantification of digestibility.