Fiber Plus Capsules with Natural Fibre. Fiber Plus is a perfect everyday fiber supplement, with a balance of essential soluble and insoluble fiber. It also has Psyllium Husk in the proprietary Herbal Blend for maximum efficiency. The Benefits of Fiber: For Your Heart, Weight and Energy Dietary fibers are found naturally in the plants that we eat. They are parts of plant that do not break down in our stomachs, and instead pass through our system undigested. All dietary fibers are either soluble or insoluble. Both types of fiber are equally important for health, digestion, and preventing conditions such as heart disease, diabetes, obesity, diverticulitis, and constipation.