I've searched the site but haven't found the answer to this perhaps obvious/ridiculous query. Why is it that you can eat a meal at a restaurant that tastes great and not overly seasoned, but the next day [or even a few hours later] you're drinking literally litres of water and you're parched like the Sahara? This happened to me after eating at an Italian resto yesterday, but has happened to me with all varieties of restaurant cuisine [I must add that it happens about 20% of the time, not all the time]. My point is, if it's the salt, it would have tasted too salty and I would have noticed- if I put even a tad more salt than normal in home-cooked meals, it practically ruins the dish with its overpowering saltiness. If it isn't the salt, then what is it? It's not the alcohol- I usually have one glass of wine, whereas I would have 2 or more glasses at home, so it's not dehydration. I'm stumped! Hounds?