Which contains more total dietary fiber?

Raisin bran cereal typically contains a significant amount of total dietary fiber, primarily due to the bran itself, which is rich in this nutrient. In a standard serving of 1 oz, raisin bran can provide around 6-7 grams of dietary fiber, depending on the specific brand and formulation. This high fiber content supports digestive health and can aid in maintaining a feeling of fullness.

In comparison, the other options provide less fiber. For instance, 1/2 cup of raw spinach contains about 0.5-1 gram of fiber. A slice of whole wheat bread usually has around 2-3 grams of fiber, while 2 tablespoons of peanut butter provide approximately 1.5-2 grams of fiber.

Thus, when evaluating the fiber content of each option, the raisin bran cereal stands out as a superior source of total dietary fiber, making it the best choice among the options provided.