I would add that in the early days of research into T2 and very low calorie diets, 2011- 2012, I was not able to get into any of the research programmes, because I had already had T2 for more than five years. I did, with support of GPnurse, use products and the supported programme for a total food replacement diet, from a pharmacy. This was self funded. I had weekly monitoring of weight and BP, at pharmacy, monthly meetings with GP nurse for weight, HbA1c, and general wellbeing checks. I was provided with ample supplies of test strips and a free meter. Also observed by specialist weight management NHS clinic, who had been cynical about me being able to complete the twelve weeks, and / or achieve the remission or weight loss. My BG had returned to normal levels within a week of starting. Overall I lost 26 kg in twelve weeks. I repeated the programme for weight loss after a short break and lost a further 23 kg. My HbA1c settled at just under 40 for a couple of years. It started to increase as some weight was gained, when I was ill with other conditions when I needed steroid meds, and was immobile awaiting surgery to my abdomen and spinal problems.
I have for several years managed T2 eating the low carb way. Apart from one high HbA1c three years ago, when I was quite seriously ill, I have maintained levels below that HbA1c threshold of 48. (Which is a contentious measure, as it indicates pre-diabetes rather than non-diabetes). Most recently HbA1c was 37, and I am not on diabetes medicines now. This is despite having to increase consumption of some carbs and dairy on advice of endocrinologist due to having developed osteopenia / osteoporosis. I still have too much weight, too, but feel fairly well. Having been diagnosed T2 for 21 years, and having pre-diabetes for at least five years prior, I am content that I have none of the predicted at diagnosis complications. No neuropathy, or retinopathy, etc.