Whey Protein Lowers Glycemic Index

In a recent human clinical trial, test subjects experienced a statistically significant reduction of up to 37.8 Glycemic Index units when a novel whey protein mixture called "Prolibra" was added to a liquid meal consisting of 50 g of glucose. Prolibra is a partially hydrolyzed whey protein isolate, high in protein and low in fat. Glanbia's suggested uses for the ingredient include beverages, powdered beverage mixes and snack bars. Since protein has been shown to reduce the speed of digestion of carbohydrates, this study result is not surprising. If viscous fibers such as Conjac were added to this mix, the GI-lowering effect should be even greater.