Newly diagnosed type 2, BMI 23, weight loss?

[Polyethyl]

My DH is newly diagnosed type 2. He has a BMI of 23. He is active. He doesn't eat junk food, nor sweets, nor sugary drinks. He drinks alcohol moderately, he never binges.
All the advice doesn't seem to apply to him.
Fasting has put some people into remission. Should someone who isn't fat lose weight? Should he fast?

Op. Please get your husband to read the link given above. It is really informative and may help him feel less shame . Shame is a real problem for people diagnosed with T2 diabetes, whether they are fat or not. Thus us as a direct result of the disgust with which fat and obese people are generally viewed and their usually medically ignorant opinions . Since your husband is fit and active, I imagine he has a fair bit of that disgust himself and is now struggling to understand his diagnosis.

The link will explain a lot about how T2 diabetes works and that overweight people can avoid diabetes because of their genetics if they keep their weight under a amount that might be much higher than for someone else . Also I think some T2 diabetes diagnosed later in life sometimes turns out to be T1 but where symptoms come out later in life .

He really has no need to feel any shame .

It was actually a munro bagging trip that caused me to nag him into going to the doctor. He went to Scotland intending to bag 5 more Munros. He came home saying he hadn't summited any of them, having turned back before he got to the peaks. He claimed foul weather but I thought him not getting any munros was sufficiently weird that I bullied him into going for that first checkup.

@Polyethyl I really do feel for him. Thank you for the information @MrsWooster @bumblingbovine49

This sounds very similar to what I'm going through plus being female and wanting a baby . . . For years now I've believed T2 is a lifestyle co edition, all the persons own fault and can be fixed by them, now I am learning that this is just simply not true in all cases. Still waiting for my results whether this is T1 or T2. Now on basal insulin to bring fasting blood sugar down to a healthy range.

My dad had no health problems, slim, exercises and says a healthy diet but he's type 2. The media love to shout out that it's caused by being fat but if that was the case all fat people would have type 2 and no slim person would. It's far more complicated than that.