Did it control your diabetes or cured it? Can you have liquids while fasting?
Fasting works or Keto diet; 40 carbs a day. Buy two BK whoppers $5 - don’t eat the bread
I had high A1C in my 60’s and was told by doc I was borderline diabetic. Diabetes type 2 is insulin resistance. I came across a video about 16 hour fasting and it made sense. Tried it and A1C dropped significantly.
So pick any 8 hour period during the day. Eat and drink your full calories during those 8 hours. It is not a diet so eat & drink anything but avoid excess carbs.
During the 16 hours drink anything which has no calories. It takes 10-14 days for body to adjust after that I had more energy and lost some weight even though I was eating a lot during 8 hours.