Looks like the Glycemic Index is Baloney

[Clodfobble]

From here:

For example, a large number of the participants' blood sugar levels rose sharply after they consumed a standardized glucose meal, but in many others, blood glucose levels rose sharply after they ate white bread, but not after glucose.

The study was unique in its scale and in the inclusion of the analysis of gut microbes, collectively known as the microbiome, which had recently been shown to play an important role in human health and disease.

In the final stage of the study, the scientists designed a dietary intervention based on their algorithm; this was a test of their ability to prescribe personal dietary recommendations for lowering blood glucose level responses to food. Volunteers were assigned a personalized "good" diet for one week, and a "bad" diet - also personalized - for another. Both good and bad diets were designed to have the same number of calories, but they differed between participants. Thus, certain foods in one person's "good" diet were part of another's "bad" diet. The "good" diets indeed helped to keep blood sugar at steadily healthy levels, whereas the "bad" diets often induced spikes in glucose levels --all within just one week of intervention. Moreover, as a result of the "good" diets, the volunteers experienced consistent changes in the composition of their gut microbes, suggesting that the microbiome may be influenced by the personalized diets while also playing a role in participants' blood sugar responses.