Back to Ask the Diabetes Team Ask the Diabetes Team

From New York, New York, USA:

I have always been skinny, I was diagnosed with polycystic ovaries at age 19 (on the basis of my hormone levels), and, when I was 23, I was diagnosed with diabetes (with all the typically symptoms -- excessive thirst, urination, significant weight loss and a blood sugar over 600 mg/dl [33.3 mmol/L], which was originally treated with oral medication. However, this did not lower my blood sugar so, after meeting with an endocrinologist, I went on insulin shortly thereafter.

For the last five years, I have never had to take more than 16 units of insulin per day and my hemoglobin A1cs are around 5-6%. Recent visits to new endocrinologist made me concerned that perhaps I do not have type 1 diabetes and do not need to be on insulin. He did a C-peptide test which was 1.5, but I had already taken my insulin the morning of the test. Does the test detect the injected insulin? I did test positive for the GAD antibody. Do you think it is possible that I could go on an oral medication? Can you please explain the relationships between PCOS and diabetes? I have heard many conflicting explanations.


C-peptide does not directly measure insulin. C-peptide is a peptide which is cleaved when insulin is secreted from the beta cells. Injected insulin may decrease C-peptide levels, however. It is best to measure C-peptide in response to a glucose challenge or when the blood sugar is greater than 200 mg/dl [11.1mmol/L]. The level of 1.5 is not high. However, it is unclear whether the result can be relied on.

The positive anti-GAD antibody is a significant finding and consistent with type 1 diabetes. Your case sounds like you have type 1 diabetes. However, individuals with type 1 diabetes may have some resumption of insulin secretion after blood sugars are brought down into the near-normal range. I would not try to get to oral agents and sacrifice good control.

Polycystic Ovary Syndrome is a clinical syndrome and is not a specific diagnosis. However, it is associated with insulin resistance and type 2 diabetes.


Original posting 13 Sep 2001
Posted to Diagnosis and Symptoms


  Back to Ask the Diabetes Team Return to the Top of This Page

Last Updated: Tuesday April 06, 2010 15:09:26
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.

This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents. Our mission is to provide education and support to families living with type 1 diabetes.
By using this site, you agree to our Terms of Use, Legal Notice, and Privacy Policy.
© Children with Diabetes, Inc. 1995-2018. Comments and Feedback.