Diabetes is a very complex disease with at least 3 types in which glucose in the blood is elevated. Click on the link for a very quick introduction.
The blood gets bad because you take in the wrong fuel. Imagine trying to run your car on kerosene, and the result would be engine trouble. Imagine if you lived in the Garden of Eden what you would have eaten, and try eating that way. Could you afford to have a blood transfusion every day? Would you even want to? Not to mention the risk of blood borne diseases like hepatitis, AIDS, and the like.
Whenever you take in more fuel than the body needs it stores it in the liver and then as fat. If you take a lot of sweets or starch at once, the pancreas tries extra hard to process this storage. If you eat this way a lot, after a while the pancreas gets sick or worn out and fails to do its job right and you end up with dangerously high blood sugar. Also, if it overcorrects which it does more and more as it gets stressed and overworked then it will push the blood sugar very low and you will feel weak, dizzy, and often with a panicky desire to eat. Then if you grab candy, pie or even pizza it will just jump way up again. After a while the poor pancreas just can’t take it any more. IF you don’t mistreat your pancreas, your blood will be fine and you won’t get diabetes.
The Atkins diet books explain ways to keep regular. Mix a tablespoon of psylium seed with a glass of water or other beverage and take once or twice a day. Also the diet calls for drinking 8 glasses of water a day which reduces drying out. At any rate it works, and after 48 hours you don’t experience unpleasant hunger. Just Google for more information.