I don't assume people bring it on themselves, but I do think the additives in foods and drinks, phosphoric acid and phosphates consumed at levels higher than those produced by the body might interfere with carbohydrate metabolism and lipid formation, as in lecithin. The body depends on phosphorus to release the energy in carbohydrates, so what happens when the inorganic phosphates are already added to the food? I think the assumption is that the food value is in greater quantity than the amounts of added phosphates and that the food normally buffers the additives, except these additives are used to extend shelf life for several more months. That can't be too good if the food cannot be broken down except by rancidity.
I had pancreatitis five years ago and got over it by avoiding those additives and by eating raw tapioca starch while making sure to hold it in my mouth to allow the saliva to convert it to sugar, and by including parsley for a time in my diet.
What I note about diabetes is the uremia (excessive blood urine levels) which accompanies the disease. Urine is nitrogenous and phosphorous is part of the nitrogen group. The phosphorous seems to hold and store urine, at least it did when I had pancreatitis.
I always think about diabetics I see guzzling Diet Coke which still contains Phosphoric Acid and wonder if that is the cause?
Funny though. Two days ago I bought Tropicana Grovestand Orange Juice (Not from concentrate) to boost my vitamin C intake and when I took a bite of a Klondike Ice Cream Bar, the taste went bitter like drinking good orange juice after brushing my teeth with flouride toothpaste.
That doesn't happen without adding flouride to the orange juice or to the ice cream.
Orange juice is used in sherbet which also contains milk without any of the flouride bitterness and there is also the Orange Julius Orange Juice drink made with milk powder. Never bitter like flouride.
The problem is, if Tropicana is adding flouride to their orange juice, flourine destroys Vitamin C. Vitamin C is a flourine/chlorine/halogen detox.
EDIT: For that matter, the entire produce section of the supermarkets out here smell not like sweet fruits and vegetables, but like a halogen tub and tile cleaner, as if the produce is being gassed to preserve it.
That vinyl chloride smell isn't what I remember from the farms of Pennsylvania.