Have you tried to control your diabetes with a ketogenic diet? Dr. Bernstein, a type 1 diabetic since 1946, is successfully managing his condition with it, and wrote a book about it.
Dr Bernstein claiming to have type I diabetes since 1946. There was not proof on his site - no epicrisis, there was no sources chapter in his book ...
I was going to say this! Ketogenic diet is the best and most stable way of eating for pretty much anyone. Fat is a much better source of energy than glucose.
Rule #1 on diet/health claims: anyone that claims something to be the "best for pretty much anyone" is virtually guaranteed to be bullshitting.