My dad had it. I'm adopted so no genetics of his, fortunately my levels are always perfect every checkup and I eat lots of meat and junk food and soda. However I do drink enough water, and eat garlic raw orcooked and in pills also and do eat a certain amount healthy also I also routinely take listed suppliments listed below
Fish omega-3 fatty acid
Garlic (healthy in many ways)
Flaxseed oil
apple cider vinegar (I drink mixed with water two times a week also helps prevent kidney stones) Lemon juice also helps kidney stones )
coffee (is actually good for you if you don't mix sugar in it but I do some)
Cinnamon
eggs
turmeric
olive oil (I eat three table spoons every two days)
and of course leaf greens
raw organic honey very healthy but MAYBE NOT for a diabetic would have to ask
https://www.healthline.com/nutrition/16-best-foods-for-diabetics
All listed above is known for heart health and other health also.
I'm sure your doctor has already gone over a dietary routine though