Fiber is in veggies, fruits, whole grains, seeds, nuts, and legumes like beans. It helps cut cholesterol, control blood sugar, and improve digestion. Women under 50 should get 25 grams a day, and men should get 38 grams. But only 5% of us hit those numbers. Taking a fiber supplement is usually safe, but ask your doctor, especially if you take medicines like aspirin. Start slowly to avoid gas and bloating, and be sure to get enough water.