A nurse is reinforcing teaching about a high-fiber diet with a client who has constipation. Which of the following foods should the nurse include as sources of fiber? (Select all that apply.)

Choice A rationale Lean turkey consists primarily of animal protein and muscle fibers, which do not contain dietary fiber. Dietary fiber is a complex carbohydrate found exclusively in plant-based foods such as fruits, vegetables, legumes, and grains. While turkey provides essential amino acids for tissue repair and maintenance, it lacks the indigestible polysaccharides required to increase stool bulk or accelerate colonic transit time, making it an ineffective dietary intervention for relieving or preventing constipation. Choice B rationale Kidney beans are a potent source of both soluble and insoluble fiber, providing approximately 13 grams per cooked cup. Insoluble fiber increases fecal weight and stimulates peristalsis, while soluble fiber forms a gel-like substance that softens stool. Normal dietary fiber intake should be 25 to 35 grams daily. These legumes significantly enhance digestive regularity by facilitating easier passage of waste through the gastrointestinal tract, thereby effectively addressing the underlying mechanics of constipation. Choice C rationale Whole wheat bread contains the entire grain kernel, including the bran and germ, which are high in insoluble fiber. This type of fiber acts as a natural bulking agent within the intestines, drawing water into the stool and promoting regular bowel movements. Unlike refined white bread, which has the fiber-rich layers removed, whole wheat options provide the structural components necessary to mechanically stimulate the intestinal lining, which helps prevent the development of hard, dry stools. Choice D rationale Strawberries are an excellent source of dietary fiber, particularly pectin and cellulose found in their seeds and pulp. A single cup provides about 3 grams of fiber, along with high water content. The combination of hydration and indigestible plant matter is vital for maintaining soft stool consistency. Increasing fruit intake helps lower the risk of chronic constipation by improving the efficiency of the defecation reflex and supporting the healthy gut microbiome necessary for digestion. Choice E rationale Peanut butter is a source of healthy fats and protein but is relatively low in fiber compared to whole plants, typically offering only 1 to 2 grams per tablespoon. While it contributes small amounts to total daily intake, it is not considered a primary high-fiber food for treating constipation. Additionally, the high fat and low water content in some commercial nut butters can actually slow gastric emptying and intestinal transit in certain individuals if consumed excessively.