People, people, watch what you're eating, please.
Anything with glutamate-related compounds in it will keep you tossing and turning most of the night. Glutamates = "hydrolyzed vegetable protein," flavor enhancers, etc, and the good old monosodium glutamate (MSG.)
The FDA has no real authority to regulate how these compounds are named, so the foodmakers can call it a lot of differnt things.
I hate to harp on this, and it is by no means the only stuff that can keep you awake (caffiene, Vitamin C for me, kids throwing up all night, etc.), but I believe it may be a major if largely unrecognized factor in sleep disruption.
Scientific? I don't know. Anecdotal? Sure. Highly significant to me after years of "anecdotes?" Yep.
Significant for you? Maybe, maybe not, but you ought to watch that ingredient list in prepared foods to find out.
You might just be, like me, a natural-born nightowl, forcing yourself into society's diurnal schedule, but for me it sure paid to keep an eye on those darned ingredients.
Terry, 230RN