Hi. From what you say you are more likely to be a Late onset T1 (LADA or T1.5) than T2. The pointers are young age and being slim. The Glipizide is typically of more use anyway than the more usual Metformin so it looks like the GP did the right thing. There are two tests for T1 i.e. the GAD test and c-peptide although the treatment routes are similar with some tablet differences. Yes, do keep the carbs down and buy yourself a glucose meter. The SD Codefree on the web is low cost. The low-carb diet may not change your total cholesterol but should improve the LDL, HDL and Trig ratios which are important - the total isn't. When you receive the cholesterol breakdown at your next HBA1c blood test/review with the GP (within 3 months) and if the ratios are good you may be able to reduce or even stop the statins.