Do not use lubricants such as mineral oil because they may keep the body from using important nutrients the way it should.Good food sources of fiber include the following:Legumes (beans and lentils).Vegetables.Cold cereals (whole grain or bran).Hot cereals.Fruit.Whole-grain breads.See the Constipation section of the PDQ summary on Gastrointestinal Complications for more information.Palliative care