What typically happens to most dietary fiber during digestion?

• A. Most dietary fiber moves to the large intestine where some is fermented by bacteria and most is excreted in the stool.
• B. Most dietary fiber is hydrolyzed to monosaccharides by brush-border enzymes in the duodenum and then absorbed as glucose, an incorrect description of fiber resistance to human digestive enzymes.
• C. Most dietary fiber is converted into amino acids in the small intestine before absorption into portal circulation, which misstates fiber fate and metabolic products.
• D. Most dietary fiber is directly used as a substrate for immediate hepatic glycogen synthesis via portal uptake of intact polysaccharides, an inaccurate route and utilization.

Answer: (A)