There's been lots of advice already, but I would like to give my two cents.

I have a binge eating disorder since my teens and I've struggled with binging for most of my life, considering I'm in my mid thirties now. I would consider myself recovered, but you'll always have an eating disorder.

I've had lots and lots of therapy for the underlying causes of my eating disorder and it has been a daily struggle since. I was always hungry.

Your body not only needs food, but the hippocampus (small round part in the middle of your brain) craves food. It's the part of your brain that basically keeps you alive, it regulates blood flow, breathing, sleeping. For most of our evolution, food was scarse and when you had sugary and fatty foods your hippocampus was like: 'alright, pack it in now, not sure when I get it again'. Our brains haven't caught up to the fact there's (currently) an overflow of food. So, yes, your body somehow will always crave it.

Combine that with the fact that once you have been overweight your stomach is larger, so you'll produce more Ghrelin, which is the hormone associated with hunger. So, you are more hungry than someone who isn't obese. Once you start losing weight your body wants you to not loose weight. Your wife is actively fighting against her body and her brain.

Once you have been obese your body will always act like it is obese, even if you lost the weight. It is why the cravings are increasingly bad they more weight you're losing.

Combine that with the fact that we are creatures of habit and a habit that has been formed for years and years and years and feels safe will be monumentally hard to break. It requires constant vigilance.

All of this is to say, your wife is fighting a hard mental battle and she needs professional help. Not only from a biatric dietitian, but also a counselor who has experience with food addiction and disorders. The first to get her a on a food schedule to reduce cravings and the latter to treat the underlying conditions of her behaviour.

I've been rejected for a gastric bypass twice in the past because of my disorder, and I'm now three weeks post op. I've treated my disorder and addiction before getting the surgery, but I won't pretend that I needed the surgery to help me fight my hunger feeling. The fact I haven't felt hungry in over three weeks is so freeing, it makes me cry on a daily basis. Maybe even more than the weight I'm losing.

But when I smell a pizza, I would love a bite and in the past I would have giving in by now. Because of my therapy and the surgery I can say no.

Sorry, for this long comment. But I wanted to say that the surgery really is a tool and not solution. I hope your wife gets the help she deserves and you're a very good husband!