Digestive ailments range from constipation and diarrhea to irritable bowel syndrome, diverticulitis, and colon cancer. According to the National Digestive Diseases Information Clearing House, Bethesda, Md., 60–70 million people in the United States experience digestive diseases.
Retail products that promote overall digestive health for everyone from infants to seniors are available at the market and continue to be developed. Nutrition bars, cereals, and beverages make claims that they benefit th…