Re: Can a human body GAIN weight over night?

David, This question is really more appropriate for a nutritional expert, 
but I'll give it my best shot. The body continues its metabolism at a 
slowed rate during sleep, restoring and rebuilding the body.
This process burns calories, even if it is a small amount, and unless 
you're eating in your sleep, it should be impossible for you to weigh more 
in the morning than you did the night before.
So, my answer is NO.