Predicted quantity of bioactive peptides (mg/d) released after digestion of either dietary proteins or gut endogenous proteins in the gastrointestinal tract.

1Estimated based on the predicted total number of bioactive peptides released after gastric and small intestinal digestion (from Table 4), and the moles and molar masses of the respective proteins; and considering that the majority of the predicted bioactive peptides are ‘dipeptides’. All of the evaluated food proteins are used as a model for the remaining proteins in the respective food product.2The model diet is based on a recommended diet for a healthy adult weighing 60 kg, supplying 0.66 g/kg body weight protein per day, amounting to a protein intake of 40 g per day, designed to comply with the FAO recommendations 1]; whereby dairy, wheat, soya products, chicken egg products, chicken meat contribute 4, 14, 3, 6 and 13 g of protein respectively; Protein content of food products estimated based on the United States Department of Agriculture (USDA) Nutrient Data Laboratory database 42].3Calculated based on Moughan, 2011 41], using the amount of gut endogenous protein nitrogen secreted into the gastrointestinal tract, but, excludes protein nitrogen derived from epithelial and bacterial cells.