Recently, I tested my glucose responses to my old ‘healthy’ breakfast using the new continuous blood glucose monitors (CGMs) as part of the PREDICT study. My blood sugar (glucose level) rose sharply from a resting level of 5.5 to 9.1 mmol and produced a surge in insulin to get my levels back to normal an hour later. I asked my wife to be a guinea pig and have an identical breakfast. Her blood sugars started lower than mine at 4 mmol, but hardly moved above 5.7 mmol.

