> As I recall, we burn glucose at about
> 8g/hour.  The authors of Life Without Bread claim that there is
> about a 3-hour window of time following a meal for glucose to be
> taken up and used.  This is why they set a maximum of 24g of
> utilizable carbs per meal.
>

does this change with mental work though? if the brain preferentially burns
glucose when given the chance do we consume much more glucose when studying
etc? if so can we take more carbs without affecting insulin output, since
the brain does not require insulin to absorb the glucose?

Andrew