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 25 grams of fiber a day for women and 38 grams for men 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:
Gradually increase the fiber in your diet to your target amount
Reach the higher-fiber target almost every day.