Can anyone decipher c peptide result?

[lorib64]

An on line Dr offered c peptide testing with consult, for a fee. I asked my endocrinologist about the test and she refused to order because she would not know how to interpret. I am type 2, overweight with abdominal fat. I am in US.

I signed up and had the test. It came out normal 1.87 the online Dr said my pancreas may be getting tired and not producing as much insulin.

I can see what my Dr meant but not sure how to interpret.

My blood test results from Feb
Fasting glucose 142 mg/dL. 7.9 mmol/L
A1C 5.7%. 39 mmol/mol

I have been eating a ketogenic diet and have recently started 16:8 fasting. Fasting glucose today was 115 mg/dL. 6.4 mmol/L
I have finally started losing some weight this month.

He encouraged me to keep up with what I am doing.

Was it a waste of money to get the test?

 

[EllieM]

My blood test results from Feb
Fasting glucose 142 mg/dL. 7.9 mmol/L
A1C 5.7%. 39 mmol/mol

Those look excellent to me. If you weren't in the US you'd be out of prediabetic range but I think the US starts it at 39mmol/mol. In any case, if that's the figures after starting out with a diabetic diagnosis, you're obviously doing something right.

I asked my endocrinologist about the test and she refused to order because she would not know how to interpret.

I am a little surprised by this because I thought it was a fairly standard test that endocrinologists ask for when appropriate (eg when determining whether someone is T1 rather than T2 but there are other reasons too).

But I can see her point in that you don't know whether the "normal" result is because your pancreas is starting to fail or whether your insulin resistance is going down or whether it's just due to the fact that there are far less carbs in your diet (or some combo of all 3). Disclaimer: I am not a doctor or T2 so this is just guesswork on my part.

In any case, in your position I'd want to know the result if only to compare future results with it.

Was it worth it? I guess that partly depends on how much it cost....

He encouraged me to keep up with what I am doing.

I can agree with that.

 

[Fenn]

Hi, nice job with your efforts, your numbers look amazing, I was diagnosed by means of C-pep but my numbers were awful even doing keto, I don’t think knowing your C-pep numbers can be a waste of money if for no other reason than to put your mind at rest.

Keep up the good work!

 

[catinahat]

I agree with the others, your results are excellent
A normal c peptide is anywhere between 1.1 and 4.4
Ideal ranges depending on age are (these are for men, women's were very slightly higher)
40-45 year's --1.29
60-70.year's --1.39
70-80 year's --1.42
As I see it, we adopt a keto diet to keep our blood sugar levels and insulin responses as close to normal as we can.
Your c peptide is well within the normal range, maybe a little higher than ideal, but you are T2 so I would have thought that was to be expected.
Think about it, if you had had these results before you were diagnosed with diabetes, your Dr would have told you your results were perfect and there was absolutely nothing wrong with you.
Great job, well done.
Ps
Here's where I got the c peptide info https://www.medchunk.com/tests/c-peptide-1.85

 

[pinkjude]

Those look excellent to me. If you weren't in the US you'd be out of prediabetic range but I think the US starts it at 39mmol/mol. In any case, if that's the figures after starting out with a diabetic diagnosis, you're obviously doing something right.


I am a little surprised by this because I thought it was a fairly standard test that endocrinologists ask for when appropriate (eg when determining whether someone is T1 rather than T2 but there are other reasons too).

But I can see her point in that you don't know whether the "normal" result is because your pancreas is starting to fail or whether your insulin resistance is going down or whether it's just due to the fact that there are far less carbs in your diet (or some combo of all 3). Disclaimer: I am not a doctor or T2 so this is just guesswork on my part.

In any case, in your position I'd want to know the result if only to compare future results with it.

Was it worth it? I guess that partly depends on how much it cost....


I can agree with that.

In the UK we dont see an endocrinologist unless your GP or Diabetic nurse thinks you need to. Even then its a long wait to see one. Your numbers look good but I dont know much about C peptides