I second that, MoonageDaydream.

I sometimes try to raise my acetylcholine levels through what I eat. I love cheddar cheese and scotch eggs, and recently I've seen a surge of lucid dreams. But I would not say these foods induce lucidity per se. They may increase REM periods and boost memory—which interrelates with consciousness—and lately I've been recording ordinary dreams and listing recurrent, potential dream signs.

I would say that, in my case, all these factors combined (as part of my jolly effort) contributed in promoting lucid dreaming.