Non-dietary causes of high blood sugar?

[Guest guest]

My father has been testing borderline high for fasting blood glucose

over the past 12 months. He is perplexed by this because he has been

on a very low carb diet for a few years now. He eats no refined sugar

of any kind, no flour and less than 60g of carbs per day. He

exercises regularly and has for years. He also takes CLO and butter

oil every day.

His mother and grandmother were both diabetics, so he's concerned

about this. What else could be causing his high blood sugar levels if

it's not his diet or lack of exercise?

One possibility that occurs to me is that he's under a lot of stress

and has been for some time. I know that during stress the adrenals

produce adrenaline, adrenaline increases glucagon production which in

turn releases more sugar into the blood.

Any other ideas?

Thanks,

Chris