I recently asked my endo for the c-peptide, antibodies, insulin level and protein test to know where after 18 years which type I am. Currently my A1C levels are within 6.2 and 6.5 during this year. So I got the results for the c-peptide test and the insulin levels results. I know that C-Peptide levels if they are high you are probably a type 2, and if they are low you are probably a type 1. I got my results in the normal range( 3.20 ng/ml) of 1.1 to 3.3 ng/ml with a glucose fasting level of 133mg/dl. The insulin level was of 27.1uIU/ML, the lab range from 1.9 to 23 uIU/mL. I have to make a note that 12 hours before I injected my dose of insulin. I did not know if that would had and effect also I am still waiting for the other two results. Although I have a hunch I am diabetic type 2 and the only thing that has controlled my diabetes has been insulin only these past 5 years.