No studies come to mind and I searched a few references as well. Fat and fiber tolerance varies among individuals after gallbladder removal. Food tolerance ranges from the same foods offending to tolerance of any foods. Commonly, fried foods, fatty meats and sausages, snack chips, seeds (some fruits ) as well as the usual fats, oils and salad dressings seem to bother persons with gallbladder disease.
The gallbladder is merely a storage vessel for bile produced by the liver. After the gallbladder is removed, the liver still makes bile and secretes it into the small intestine via the common duct. Bile emulsifies fats so that dietary fats can be digested by enzymes and transported into the blood or lymph system. Gallstones are usually made of cholesterol, which is a component of bile.