I just had my C Peptide retested and here are the results:
June 2010: C Peptide 3.4 (range 1.1-4.4) BGL 91 (low carbing for 3 months before this test was done on 34 units Lantus) A1c: 6.3
August 2011: C Peptide 0.8 ( range 1.1-4,4) BGL 75 (continued low carbing on 28 units Lantus)
Done at same lab. A1c: 5.3
Little background: Diagnosed end of March 2010 with bgl between 300-450. Started Lanus immediately to get bgl down before upcoming surgery. The year before I had a couple high bgl's but the doctor though it was due to my thyroid cancer and the surgeries I was having at that time (25 years prior suffered with Hashimoto's). Since diagnosis, I have gotten my a1c down to 5.3 through low carbing (30-50 gms a day). Lately I feel like I practically have to starve myself to keep my bgl's down. At my doctor appt. (same day blood was taken but not all results were back), the doctor suggested going down on my Lantus since I was doing so well. I have since gone down to 22 units and my fasting bgl is about the same but I am spiking more and staying higher longer. I have an appt. with my endo in Sept. to get antibody testing as my doctor said he didn't know much about the antibody testing. So, my question is, is my change in C Peptide significant or is it just the result of low carbing and Lantus? Any comments would be appreciated.