For over two years I have had prediabetic HbA1c test results, creeping upwards from 43mmol/mol in a routine test in May 2018 to 47 at the last test (just before lockdown in March). 48 will indicate diabetes. After the first test result I bought a blood glucose monitor and, whilst, thoroughly researching the subject, immediately put myself on a very low carb diet resulting in a reduction from an already good BMI of 19.5 to 18.3. I have never been overweight, eaten healthily (and in addition I followed the 5:2 diet for 4 years prior to the first test) and always fit and active through both cardiac and resistance exercise. I have a sympathetic GP who, having consulted our local endocrinologist, offered a CT scan of the pancreas in December which showed no problems. I would really like to know what the cause is of the prediabetes, since it is clearly atypical, and would like to have a fasting insulin test to work out whether the problem is insulin resistance or glucose intolerance but the endo says there are no appropriate tests he can do without further symptoms and the GP has her hands tied with nothing further she can suggest. I received an invitation from my surgery to join the NHS diabetes prevention programme but declined explaining that I was already doing everything the programme could suggest. With lockdown and all the NHS restrictions in place, I don't feel I can ask for a further blood test at the moment and it seems unlikely that I will see the same GP again. Nor do I feel there is actually any interest from the medics to do anything other than to 'watch and wait', presumably for diabetes or something more specific to finally kick in so they know what they're dealing with. I've read endless studies and papers about age related beta cell reduction (I'm 70) and how beta cells can be regenerated and have tried various tweaks to my diet and exercise programme but the only thing I've found that shows a significant but temporary improvement in my finger prick tests is exercising half an hour or so after a meal which blunts the postprandial spike. Nevertheless, my fasting BG (which should be under 5.5 to be normal) is almost always in the 6s, sometimes the 5s but never the 4s. Very, very occasionally (about 6 times in 2 years) I have been astonished to have a reading during the day in the 4s which I could never justify on the basis of anything I had done.
Do I just have to accept that there is nothing further I can do and wait for what seems an inevitable decline into diabetes, which I really want to avoid?