For what it's worth, I'm a T1D that has been in honeymoon for three years since diagnosis (with no external insulin) by going on a ketogenic diet. (Disclaimer - no one try this without consulting your endocrinologist...)
A close friend is T1D and says going keto/LCHF over the last year changed his life. Still on external insulin but often reporting at non-diabetic levels. I can say for myself intermittent fasting has kept me in some of the best shape of my life.
