Dietary fiber is the indigestible material in plant foods, including vegetables. It helps maintain regular bowel movements and a full sensation after eating. People get fiber from food or supplements, usually with a glass of water and often alongside meals.
Fiber slows how fast the body absorbs carbohydrates, which helps steady blood-sugar levels. Some medications absorb differently when you take fiber, so space out your doses. Ramp up your intake slowly and drink plenty of water, or you might get bloated.
Most adults fall short on fiber. Whole grains, beans, fruits, and vegetables supply it naturally. Powder and pill supplements offer another option when diet alone does not meet the mark.