While a low-fiber diet may not be recommended for some people, the average healthy adult should consume 25 to 30 grams of fiber a day. People younger than 19 should eat 14 to 25 grams each day. Although high-fiber foods are good for your health, adding them too quickly into your diet can irritate the stomach and cause gas, cramps, and bloating. Talk to your doctor before increasing your daily fiber intake. And be sure to drink plenty of water and stay active while your digestive system adapts to the change. To learn more about daily fiber guidelines and to ensure you’re getting enough fiber in your diet, visit the UPMC Digestive Disorders Center or call 1-866-442-7876 for an appointment. Editor's Note: This article was originally published on July 2, 2019, and was last reviewed on August 15, 2022.