When I am on a diet and reduce my caloric intake I feel extremely tired. At times I just cannot think clearly. As soon as I eat something I feel better.

Will I still experience this tiredness if I have the surgery? Eatling less is something I can do but the tiredness worries me.

For myself the type of food I choose to eat makes a huge difference to my energy levels eg. eat a hamburger or chips and I have a quick burst of energy and then I am tired and hungry again an hour later, eat a couple of slices of wholemeal toast and a piece of fruit and I am fine for hours. I have only been banded about ten days ago and am finding myself full of energy even though I am eating so little compared to pre-banding (I am on mushies and protein shakes).

I wonder if my tiredness is psychological due to the hunger I feel while dieting? The type of food really does not make a difference for me. I can feel so tired and week that I become dizzy. I am hoping this will not be a permanent thing if I have the surgery.

The tiredness when dieting often has more to do with the type of calorie than the lack of calories.

Low GI foods keep the blood sugars steady, where as higher GI foods (white starches, some fruits, sweets, sugars ect) send the blood sugar up, making you feel less tired for a while, and when the blood sugar comes back down (and it usually does so fairly quickly), you feel like crap again.

I would suggest that you have at least a few things to discuss in detail with the surgeon. As a psychologist myself I would not be sure that the tiredness has a psychological basis, I would tend to think that the answer lies in the types of foods you are eating. As Chickie above said, the Low GI foods are the way to go if you want to reduce the sugar highs and lows.