vereating and too much alcohol. My dog and I had dined relatively lightly and had avoided the wine, which explained our alertness. Also, ingesting large amounts of carbohydrates can be a drain on your energy level, and the digestion process itself draws blood away from the brain, causing fatigue. So more likely than not, my dozing family was sleeping off an indulgence in good food and well-being, rather than being strung out on a tryptophan high. And I figured it was up to me to explain it to them so they'd never use that excuse again. ...