I tried, but both links don't work. Please relink?
On the same vein, for a deeper dive, I recommend these two courseras. Without an understanding of the pathology, a RCT and epidemiological study are just incomplete cliff notes. Want to have a deeper grasp of the subject? Pick up a textbook or dive into one of these MOOCs.
https://www.coursera.org/learn/diabetes-essential-facts
Do you want to understand carbs better? Why is a gastric bypass essentially a cure for type 2 diabetes? Learn more from the University of Copenhagen and their excellent lectures.
To understand carbs, you must also understand exercise physiology as they are inextricably linked. Carb expenditure, tolerance and requirements for optimal performance are generally a function of time at % of lactate threshold. Learn more through this series.
https://www.coursera.org/learn/science-exercise