----- Original Message -----
From: "Amadeus Schmidt" <[log in to unmask]>
A high-protein evening meal therefore reduces the plasma
ratio of tryptophan to the competing amino acids so less tryptophan
is carried across the barrier and less reaches the neurons.
Conversely, a high carbohydrate meal in the evening tends to
increase serotonin utilization levels.

But of course....  Foods higher in carbohydrates(read tryptophan) will put
one to sleep.  This is why students are falling asleep in classrooms.  High
carb diets.   Look at any school menu.  It would choke a cavemate to sleep.
Cheers, Oliva