Are there changes in hunger after WLS?

I've heard that many people experience a significant decrease in hunger after gastric bypass surgery. How about for the lap-band procedure? Are there any reports of a decrease in hunger after getting a lap-band? Are there any hard statistics out there on the number of people reporting a significant decrease in appetite, arranged by procedure? I've seen people on this site refer to something as "head hunger" too, which I am guessing is a conditioned eating response triggered by something other than actual, real hunger. I'm curious about this, because at times I have these uncontrollable food binges, which are clearly "head hunger" and I'm worried about how to deal with this after WLS. I've significantly decreased these binges already, with corrective conditioning, as directed by my nutritionist. Getting rid of actual hunger pains, though, would go a long way for me in the lifelong change I am preparing to make with WLS.

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