A report at Endocrinology Advisor says that glycemic index values of the same foods can vary widely and may be an unreliable indicator of blood glucose response.
Glycaemic Index (GI) is an indicator of how quickly the sugars from a food will be released. The lower the GI, the slower the release of sugar. As the amount of sugar in your blood increases, more insulin is released.
For people with diabetes, whose insulin response is broken, eating foods with high or low GI can be a way of ensuring their don’t enter hypoglycaemia or hyperglycaemia between insulin injections.
Researchers checked blood glucose responses in 63 healthy adults after eating the same amount of white bread 3 different times over 12 weeks. The investigators found that glycemic index values varied an average of 20% among individuals and 25% between different study participants.
The research was published in the American Journal of Clinical Nutrition in September 2016.