Hi Welcome to HCM
I have gone through you query .and found your dad's has managed his
diabetes through control on his diet . It is really recommendable . In my opinion i don't think he requires any medication for the time being .
He should keep it up and continue his regime of avoiding sugar and carbohydrates - rice potato, fats ,fried, fast foods , overuse of tea ,coffee ,alcohol and colas . as you know ,' pervention is better than cure '
More use of
antioxidants , like fiber rich meals , ginger ,garlic ,onion lemon ,oranges guava etc help balancing blood sugar
Regular Walk ,exercise , Yogassanas & pranayam helps in checking the weight and function of
pancreas which is responsible for producing
insulin ,
Fenugreek powder 10 gm with water in the morning and evening
Bitter gourd juice 30 ml
garlic 5 - 6 cloves cut pieces gulp with water
Lemon fresh juice with water twice befor meals
Turmeric 1 level t spoon in a cup of hot milk
All above are antioxidants , 3-4 of them to be every day
As we grow in age our body needs special supplements , which have no side effects , to remain fit & healthy
I suggest, with all these regimen , he must see his treating doctor, off and on to get his feed back and regular check up
Hope this helps you in solving your query Take care and All the best
Don't hesitate to get back for further query