Continuing the discussion from C-peptide results help:
I’m going to preface this with … I don’t know nearly enough and I’d like to know more. I also don’t know, if what I know, is accurate.
It’s wonderful that people who want too, can order their own labs and pay for them out of pocket (OOP). One website is linked the post this discussion is continuing from.
While I was reading the thread above, it dawned on me, when we (the collective body) order our own lab tests, do we know what we’re doing?
It would be great if those with more knowledge could help us (again the collective body) put together a list of what goes with what and why.
Take the c-peptide for example. In reading and listening I see where you should also have a blood glucose drawn at the same time. It matters. If the blood glucose is normal/high and the c-peptide is low/low normal, it points more to Type 1. Where if the blood glucose is high and the c-peptide is on the high side of normal or high, it points more to Type 2. I’ve read where a person with Type 1 can also have insulin resistance (Type 2). Is there a special way to read/perform a c-peptide for that occurrence? With a c-peptide test exogenous insulin (that which we inject/pump) as opposed to endogenous insulin (that which our body’s [should] produce) appears to matter as well. I’ve heard the test is best done without exogenous insulin on board.
With other tests, such as the antibody tests, I’ve read where some are done only when you have not begun to use exogenous insulin. I’ve read where some only show up during the initial period of diagnosis, but if your diagnosis is old (I don’t know - 1+ years), it does not show. I’ve read where a person can be Type 1/LADA without testing positive for any antibodies.
I’m sure there are other lab tests relevant to diabetes, but what are they and how do they work?
If you can help wade through this with us (again, the collective us), please do.