While it’s okay to use a fiber supplement or fiber-fortified foods to get that little bit of extra fiber to hit or exceed your minimum fiber target, we recommend that you get the majority of your fiber naturally through food.
There are two main reasons for this:
There are many types of fiber, and each type plays a slightly different role in your body. For example, some types are a great source of fuel for healthy gut bacteria, others can bind and lower cholesterol, and some are better for controlling regularity. Most supplements provide only one type of fiber, so if you’re relying on one supplement to get most of your fiber, you’ll be missing out on many of the great benefits you’d get if you were to instead consume a diverse range of fiber from food.
Foods that are naturally high in fiber also tend to be an excellent source of vitamins and minerals. By getting the majority of your fiber from food, you’ll maximize your chances of meeting your daily micronutrient requirements (vitamins and minerals).