I recently started eating a sweet potato with dinner 2 or 3 times a week and discovered I sleep a lot better on those nights. After doing some research, I see that sweet potatoes frequently turn up on lists of foods that help sleep. They have a lot of tryptophan and potassium, so maybe one or both of those things help me. However, supplementing with oral tryptophan and potassium doesn't help my sleep in the least. I've been on Xyrem for years, and on the Narcolepsy forum on Talk About Sleep, users often recommend supplementing with potassium or eating food rich in it. There's some thought that Xyrem depletes potassium, but my yearly blood tests have never shown anything but perfectly normal sodium and potassium. Sweet potatoes also have a lot of carbs and naturally occurring sugars which can help sleep, but on occasion when I've had high carbs in other forms with dinner, I haven't noticed any sleep effect. Anyway, I'm tickled by this discovery. It's so easy to bake a sweet potato at 400 for an hour. I love them, but my husband wouldn't touch one if you held a gun to his head. I think it's one of those foods people either love or hate.