What tests do doctors do to figure out if you have Type I or Type II Diabetes?

I tried asking this last week and people were just saying what the difference between the two are. I know that already. Type I - the body isn't making insulin. Type II the body isn't making enough insulin or the body is resistant and not using it properly.

That being said how do they test to see if you are making insulin and if you are - how much you are making? Is there a specific blood test? Or other kind of test? (Not the A1c - that just tests your sugar levels over the last 3 months) It can't be that the doctors just assume based on your age. Thanks.

The reason I am asking is I have been diagnosed with type II diabetes but I have had problems with my sugar since I was a kid. They never gave me a glucose tolerance test. They only checked my fasting sugar and did the A1c test which tests if your sugar has been high over the last 3 months. I want to know if there are any tests I should request to make sure that everything is right.

They can do a c peptide test to distinguish between type 1 and 2.

Blood tests i think.
One of my friends has diabetes.

Yeah they do specific tests but they study the different things about the blood compared to 1 or 2 type diabetes relativeness.

They do a glucose tolerance test, where you don't eat anything for a certain amount of time, I think it was 12 hrs, and they take your blood, then they give you a gross sweet orange soda to drink, then they take your blood, like every hour for four or five hours, to see how you process the drink.

there is blood tests they do and that is all it takes. you dont' need to test this and that. it also can take tests and see for 3 mos back how high your sugar level was. also if you are one you get shots and the other one can be done with pills.

ummm type 1 diabetes is genetic lmao..
and type 2 is developed such as from eating fatty foods or so people say the american diet... like mcdonalds and burger king all day

i dont know how they check your blood for diabetes, because
blood only contains plasma, hemoglbin, platelets,leucocytes, and iron
insulin is in the pancreas.. but you can tell if you have diabetes or not by sniff your urea(urine) if it smells sweet then you have diabetes

I think you answered your own question: People with type II diabetes have high levels of insulin and high blood sugar; people with Type I diabetes have little or no insulin and high blood sugar. You can determine the type by tracking both insulin and glucose levels following ingestion of glucose.

This is a very good question.

I did a lot of searching for the answer, as I'm sure you have, and could find no blood test that would make the distinction. In theory at least, it would seem that an insulin level determination would help, but there was no mention of this being used.

Type 1 is caused by no insulin production by the pancreas.
Treatable only with injections, and occurs when young, usually under 20. So, if young, I guess the clinical assumption is that you have Type 1 diabetes.

Type 2, over 25 and caused by inadequate insulin production, or resistance to its effect. Treated with diet and one or more pills that encourage insulin production or reduce resistance.

If diet and pills don't work, I suppose they switch to insulin and call it Type 1.

Why don't you ask your doctor? Maybe he can give a good explanation. I would hope so.

Good luck.

Well, does it really matter now??? There are certain blood tests that they do. I don't know the name of the test, but I do know there is one. You should just ask you doctor. They like to answer your questions