What does it mean if you have 'robust levels of insulin'. I have Type 2 diabetes for years. My blood sugar levels have remained consistently high. I have never been given any education or support. I have lots of symptoms ie extreme thirst, continuous thrush, boils, eye trouble,and loads of other things. It seems like they are suggesting I don't have diabetes? I diagnosed myself with type 2 diabetes after years o problems. I went to GP who confirmed this with blood test and put me on medication. No one told me what type of diabetes I had. However every blood test I have had shows my blood sugar readings getting higher. This test was called C-Peptide and they say I have ' robust levels of insulin.