> I don't know.  Maybe, but I find it tiresome.  As I've said
> before, there seems to be a predictable trajectory: a strong
> start, a reasonable period of stasis, followed by a period of
> increasing restlessness and a sense of needing to fight to
> maintain vigilance.  Am I the only one who experiences this?

No, that is the trajectory I follow too. One of the benefits of changing
diets a little bit, occasionally, is renewed enthusiasm for the whole
affair. Without it there is gradual decay into SAD...

--Richard