If you want to lose weight, you don't need to eat dietary fiber powder Dietary fiber comes from food, especially coarse grains, such as corn, sorghum, millet, soybean, whole wheat bread and so on. These foods contain natural fiber powder, so you can eat them as long as you eat whole foods. When we eat dietary fiber, we also consume a lot of vitamins and trace elements, which can promote metabolism and increase nutrition, and kill two birds with one stone. Eating only dietary fiber may not be effective.