The growing trend of "fibermaxxing" emphasizes fiber. Fiber supports digestion and nutrition of beneficial intestinal microbes. It helps regulate blood sugar and cholesterol levels. Scientists say that getting enough fiber reduces the risk of obesity, diabetes and some cancers. Insoluble fiber increases stool volume and prevents constipation. Soluble fiber acts as a prebiotic, supporting the growth of bacteria such as Bifidobacterium and Lactobacillus. Short-chain fatty acids (SCFA) from fiber improve the integrity of the intestinal barrier and reduce intestinal permeability.