Twenty healthy individuals participated in the study and on two occasions consumed the ketone monoester supplement or a placebo after a 10-hour fast. Thirty minutes later they consumed a drink containing 75 grams of sugar (i.e., a standard oral glucose tolerance test). Blood samples were collected every 15-30 minutes throughout the entire 2.5 hours protocol for analyses of glucose, lipids, and hormones. Compared to the placebo, the blood sugar spike was reduced on the day that the individuals had consumed the ketone drink.
It should be noted that this study was conducted with healthy young individuals, to reduce the confounding influence of insulin resistance, beta-cell dysfunction, and medications, so more research is required to know whether it will apply to people with prediabetes, type 2 diabetes and obesity. The physiological mechanisms that underpin the improved blood sugar control also need to be understood.
Professor Jonathan Little, from the University of British Columbia’s Okanagan Campus, was part of the research team and said: