Hi, My mum has had a few HB1AC tests over the last couple of years. She is 66 and quite active doing multiple long walks every day. Her results have gone like this. The first score 41 in March 2017. 43 in July 2017 46 July 2018. Here she was told to see the diabetic nurse. She did this and has massively changed her diet and has been ultra strict. She has lost lots of weight (almost 1.5 stone) and now down to around 10 stone. she looks great and feels healthy. She has been following various diets to help reduce the carbs. She basically doesn't eat them. Blood test Oct 2018 showed 43 so she thought she was on the right track. Since then she has been incredibly strict with her diet and doing really well. Today she got her blood test results of 46! She is very disappointed and upset as she has worked so hard. The doctor hasn't suggested anything and said the test has an error margin of 2 or 3. He is happy with her. I have told her if she eats healthy, exercises and is now at the perfect weight then forget about the test. In reality is she close to being diabetic? What is causing it to be high? Thanks in advance for any help you can give me.