If I eat grains, especially bread, before midday I'm hungry for grains for the rest of the day and usually eat twice as much as normal. I've learned to stay away from it. That's really, really hard to do. Bread is such an instant food!
Someone once told me that it's the fillings in the sandwiches that stack on the weight, but I'm convinced it's the grains. They make me hungry, not satisfied. I eat that stuff 'til I'm stuffed! And feel really, really awful afterwards.
One thing I have noticed over the years of eating bread - especially things made from refined flour - I tend to get down and depressed, often really depressed, straight away. Talk about mood changes! I used to blame myself and think something was psychologically wrong, but a few times when it happened after I was okay and happy and not at all emotional or stressed, I began to suspect my diet. Now I don't go near scones - they do it every time. And I LOVE scones!
People who don't get this reaction to bread or grains generally tend to think I'm nutty.