Kumar said:
But high blood sugar will normally be possible when low insulin is there in blood. High & excess insulin levels can be there in IR condition.
Anyway, do you people want to say that in IR condition, there can't be unutilized insulin, if hyperglycemia is also there.?Means, all the secreted or injected insulin will be utilized which is still not sufficient to metabolize all the available glucose in blood, so hyperinsulinemia happens? Do you want to say that there can't be hyperinsulinemia when glucose level is still higher? If yes, what is then the meaning of IR?
Can you tell me about cycle of insulin in normal & in IR condition?
*sigh* If there's a heaven, I hope I'll be rewarded for my patience
Anyway, there just might be an angle here that has not been crystal clear so far, so let's remedy that:
Kumar, assume you are charged with throwing pepples through a home in the wall. For some reason, you aim is only so good, and with no room for improvement (quite appropriate for you, in fact

). Now, as long as the hole is big, you can hit it virtually every time. But now suppose the hole is made smaller; now, only half the pepples you throw actually go through the hole, the rest are wasted. Lets assume the hole is made even smaller, so only one in ten go through. So for each pepple you get through the hole, you need to throw 10.
Get it?
Now, consider insulin. Insulin can be seen as a key that opens the cell to clucose. In an oversimplification, you can say that each insulin molecule lets a glucose molecule through.
Now, in a healthy person (no IR), the "keyholes" are large and plentiful, so a given amount of insulin in the blood-stream quickly and effectively lets the available glucose through the cell walls and make it available for the metabolism. Thus, the amount of insulin effectively regulates the BG level; more insulin, the BG falls, less insulin, it rises. So when you eat, glucose enters the bloodstream from the digestive system. Sensing the rising BG, the pancreas releases insulin, so the glucose can go into the cells and be metabolized. After a while, the BG falls back towards quiscent level, and the insulin secretion slows down acoordingly, maintaining equlibrium.
This is how it works in a non-diabetic person. One more thing you need to know to know is that insulin is short-lived; once released into the blood-stream, it only exists for a limited time, then it is broken down, whether it is used or not.
Now. let's look at the type 1 patient: Herethe pancreas is not able to produce enough insulin (in some cases virtually none at all is produced), so when this person eats, and the BHG rises, little or no extra insulin is released. So the glucose stays in the blood-stream (and glucose is NOT short-lived) where it is only removed slowly by whatever insulin IS released, plus whatever can be removed through the urine. The effect on the patient is that BG is high, but cells are lacking energy.
Over to the (early stage) type 2 patient: Here the pancreas is able to react to the increased BG after eating, and therefore the insulin level in the blood rises with the BG. Unfortnately, due to IR, the "key holes" are small and reduced in numbers, so even though a lot of insulin is present and there is plenty glucose around, only a limited amount is getting through. Like with the pepples, a lot have to be thrown to get a few through the hole in the wall. At a later stage, the insulin production also falls, but that's another story.
This should explain why I make a distinction between elevated insulin and excess insulin. And it is not relevant to talk about unutilized insulin, because even though it does not all get to let glucose into cells, it is all needed to create a sufficiently high concentration, so that SOME glucose gets through.
...
Well, I tried

.
Hans