General daily fiber intake recommendations for adults by sex are closest to which values?

• A. About 14 g/day for women and 28 g/day for men.
• B. About 25 g/day for women and 38 g/day for men.
• C. About 40 g/day for both sexes.
• D. Fiber intake recommendations are not defined by sex.

Answer: (B)

Fiber supports digestive health and helps reduce risk of certain diseases, so daily targets are set with sex differences in mind because men generally have higher energy needs and eat more overall. The commonly used general goal is about 25 grams per day for women and 38 grams per day for men. This aligns with typical dietary guidelines and reflects the idea that men usually require more fiber to match their higher caloric intake.

Options that suggest much lower amounts or the same amount for both sexes don’t fit real-world guidance, and saying fiber recommendations aren’t defined by sex isn’t accurate because guidelines commonly provide sex-specific targets to better match overall energy and nutrient needs. Keep in mind these are general targets; individual needs can vary with age, pregnancy, lactation, and health conditions. To reach these goals, include plenty of fruits, vegetables, whole grains, legumes, nuts, and seeds, and increase fiber gradually with adequate fluids.