Effect of Soy Protein and Polydextrose on Food Intake in Young Chinese Adult Males

The primary hypothesis of this study is that the higher concentration of soy protein intake will increase satiety and decrease the energy intake at the subsequent meal. The secondary hypothesis is that the synergistic effect of soy protein and polydextrose will further increase satiety and reduce energy intake at the subsequent meal. The third hypothesis is that the ingestion of protein and polydextrose will differentially impact on satiety-related metabolism, i.e. blood glucose, insulin, urea, plasma amino acids, gut hormones and gastric emptying.