I had the DS loop so I'll answer what I'm sure about.
My doctors told me no potatoes, bread, beef, Pasta or greasy foods. they strongly suggested Black Beans, ground turkey, and chicken. Also they told me to not drink my carbs so no juices. I actually can't eat greasy food because i can't digest grease. For me even one bite of Pasta makes me nauseous. I can actually eat potato chips for some reason, but I don't because I want too keep the weight I've lost off. The same goes for bread. When I do eat I try to stick to six ounces of food like my dietician told me. My Surgeon Dr. Cottam Works in Salt Lake ,we had to pay I think a $350 education fee plus the out of pocket for the surgery itself which the insurance I had paid for most of. out of pock was more then $2,000 . Dr. Cottam works out of the Bmi they have a website Bmiut.com. Though Dr. Cottam only does the DS Loop.