@JPS Acceptable HbA1c levels sometimes cause confusion. This is a matter for the individual as much as the GP/DN. Here is the link to the NICE Patient Decision Aid:
Type 2 diabetes: agreeing myblood glucose (HbA1c) target (Feb 2022).
On page 3, you will see the big two-way arrow says:
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A lower HbA1c target may be better (e.g. 38 or lower): Thinking about my age and my health overall, my quality of life in the long term is important to me.
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A higher HbA1c target may be better (e.g. 42): Thinking about my age and my health overall, my quality of life in the shorter term is more important to me.
As far as I know the significance of these numbers in rather broad terms is:
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HbA1c <=38: normal.
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HbA1c 39-42: pre-prediabetes, insulin resistance begins, liver glucose control affected by visceral fat.
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HbA1c 43-47: prediabetes, insulin secretion falls, fatty liver develops leading to CV risks.
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HbA1c >=48: diabetes, progressive loss of glucose control, rising risk of of complications.
Many people are happy to control their diabetes with HbA1c in the 50s, many others want to achieve remission by getting HbA1c down below 48 without medication, and some decide to lose weight to get their HbA1c down into the 30s as it was years ago. All three options require a conscious effort to adopt a healthy diet and keep your body in shape.
It is much easier to go for the third option when you are prediabetic. Dr Unwin has a 93% success rate with his prediabetic patients, compared with a 50% rate with T2 patients. However chances are very high for the newly diagnosed, as I was lucky enough to discover.
Good luck to you.