> A friend of mine who is actually rather thin has learned his glucose
levels
> are on the high side.

Don't assume that his doctor took the blood glucose test properly and
interpreted its significance accurately.  If a blood sample was taken an
hour after eating, for example, his blood sugar would naturally be high.

Here are some standards:

FASTING BS
hypoglycemia - under 50 or 70 mg/dl (two different standards)
average (normal) - 87 mg/dl (range: 75 - 100)
pre-diabetic - 110 - 125 mg/dl
diabetic - 125 mg/dl (or higher) (updated standard; previously 140 mg/dl (or
greater)

AFTER EATING (about 45 minutes)
average - up to 140 mg/dl
moderate insulin resistance - 180 mg/dl
pre-diabetes - over 200 mg/dl

> He also reports that if he eats a heavy meal at night
> it's harder to get up in the morning than if he didn't and he wakes up
> ravenously hungry, to boot.

This *could* suggest insulin resistance/hyperinsulinemia and morning low
blood sugar.

> He knows for sure his glucose isn't quite right
> and his reaction to carb-rich meals makes it clear his insulin levels
aren't
> too nifty, either.

You generally can't feel high blood sugar.  Don't rule out food
allergies/sensitivities too.  A paleo diet is always a good place to start.

Rob