I know exactly what you wrote and meant and I think it’s nonsense.
The increase in diabetes is not because people are stopping eating meat and that’s making them eat / drink more carbohydrates
It’s the exact opposite
Vegetarianism in India is decreasing, down from 33% to 26% since 2019, during that same period diabetes has increased.
So what you’re suggesting is the exact opposite of what is happening.
More Indians are eating meat & fish and more of them are diabetic
No, they are not stopping eating meat, they are not eating meat in the first place and so conditioning their diet to overconsume and overcompensate with carbohydrate, which is causing weight gain and diabetes. Generally if you eat more protein, you don't want as much carbohydrate, so lose fat, hence why keto/caveman diets work.
Because of the modern production of fast food/cheaper carb overload options, diabetes is increasing because of the ease of access to it and lower cost... it didn't exist before.
Excessive carbohydrates cause diabetes, not excessive protein or fat - this was a mistake made by scientists/doctors in the 1990s that lead to worsening levels of diabetes.
I don't know how you get exact percentages of vegetarianism levels in India.. it's over 1 billion ppl.
We can agree to disagree on this and both walk away thinking we are in the right

