Acute Satiety Response Of Mammalian, Avian And Fish Proteins In Dogs

This study investigated whether the source of protein in our diet affects how full and satisfied we feel after eating. While previous research suggested that fish proteins might be more filling than meat proteins, researchers wanted to test this theory more rigorously using dogs as a model.

The researchers fed ten dogs equal amounts of protein (100 grams) from five different sources: pork loin, beef loin, chicken breast, salmon, and pollock (a white fish). They then measured various blood markers related to hunger and fullness over two hours, including glucose, insulin, ghrelin (a hormone that increases appetite), and GLP-1 (a hormone that promotes satiety). Three hours after the protein meal, the dogs were offered their regular food, and researchers tracked how much they ate.

The results showed that while different proteins caused some variations in blood hormone levels, these differences didn't translate into meaningful changes in appetite or food intake. For example, salmon caused slightly higher insulin levels, and beef triggered more GLP-1 release, but the dogs didn't eat significantly less food later regardless of which protein they had consumed first. This suggests that the type of animal protein may be less important for satiety than simply ensuring adequate protein intake overall.

This research helps inform our understanding of protein and appetite control, though studies in humans would be needed to confirm these findings apply to people. In clinical practice, this suggests that patients focused on weight management and metabolic health should prioritize getting sufficient high-quality protein rather than worrying extensively about whether their protein comes from fish, poultry, or meat sources.