Well, it depends on so many factors, and we're not "one size fits all"...
That being said, most of us on this forum have our best success with controlling diabetes by eating LOW carb and with high fat and moderate protein.
I'm a 46 year old male and I eat as much as 10% of my calories from carbohydrate, and about 50-60% from fat and 30-40% from protein, give-or-take. Most people don't need as much protein as I do, unless they're doing serious weight training.
For 2000 kcal a day I'd recommend about 10% carbohydrate
(about 50g), 70% fat (about 150g) and 20% protein
(about 100g) for men as a place to START. It may need tweaking from there.
Most of the medical community and our governments are still advocating "low-fat" and with 50% calories from carbs, but that's just not the correct way to eat, especially for diabetics.
A Type 2 diabetic that gets 50% of their calories from carbs will QUICKLY become an insulin-dependent and very obese diabetic. Not a healthy one.
Read
Dr. Richard K. Bernstein's 'Diabetes Solution' (some of it is even online, free) and check out sites like
Dr. Andreas Eenfeldt's site, and especially his info on
LCHF/Low-Carb, High-Fat diet.
There's also great information at
bloodsugar101, especially the write-up on '
How to lower your blood sugar'.
:welcome: to the forum, it's a great place for information!