If you have IBS with constipation you probably already know how important fiber-rich foods are for your comfort. Making the American Dietetic Association's recommendation to eat 20-35 grams of fiber a day your mealtime mantra is a great place to start. But in order for a high-fiber eating plan to work its magic, you have to do three things:
Reach the higher-fiber target (of 20-35 grams of fiber a day) almost every day.
Spread high-fiber foods throughout the day so it works better.