Here's an easy way to get 14 grams of soluble fiber (per serving)! Nature's Answer Liquid Fiber is a lemon-lime flavored liquid supplement that makes it easy to incorporate more fiber in your daily diet. The USDA has established that fiber is an essential part of a healthy diet. The best way to get your fiber is by eating a variety of fruits, veggies and whole grains. That can be hard to do consistently day in and day out. That's why Nature's Answer developed this great-tasting liquid fiber supplement.