No one here is claiming such things, that's for sure. This thread is about IR. An A1C of 5.6 is the least of your worries.Diet and exercise are not "cure-all's" and will not fix or even improve many serious or significant diseases. For example, Parkinson's will likely destroy the body, regardless of how healthy one behaves. I have multiple autoimmune diseases (MCTD and Hashimoto's) along with Secondary Adrenal Insufficiency.
I'm currently on the Carnivore diet for weight loss (meat only). I'm not really heavy at about 205, goal about 190. Carnivore has not helped my autoimmune conditions one bit, despite some very lofty YouTube claims. Nor have I been able to reach 190, that will take some serious fasting. A1C has been hovering around 5.6 to 5.7 as I take up to 20Mg Prednisone and 40Mg Hydrocortisone per day, and of course, being older.
Despite Youtube claims that Carnivore would get A1C down to 5.0 or something, I not seeing that.
My only advice is to listen to your doctor, eat only wholesome non-processed foods and do stay as active as you can.
As for Youtube claims, it's like life, you need to do your own rigorous verification. And getting your A1c to 5 is possible, maybe, but why? BG of 100-110 -120 is more than OK ESPECIALLY considering you are taking 'isone drugs and you are older. PLUS that logic is a bit backwards anyway, one needs to get BG low first and then explore the body being in ketosis. Does that make sense?
Bless you brother and get better man!