The study, published in the journal Diabetologia, saw 15 individuals with well-controlled type 2 diabetes taking either 50 grams of whey in 250 ml of water or a placebo of just 250 ml of water on two separate days. This was followed by a high-glycemic index breakfast of three slices of white bread and sugary jelly – designed to create a post-meal glucose spike.
“The results showed that over the whole 180 min post-meal period, glucose levels were reduced by 28%, after whey pre-load with a uniform reduction driving both early and late phases,” the Lund University, Tel Aviv University and University of Jerusalem researchers wrote.
They said insulin and C-peptide responses were significantly higher than the control group at 105% and 43%, respectively. Meanwhile early insulin response was 96% higher after whey.