There's a group of carbohydrates sandwiched between simple sugars (monosaccharides) and starches (polysaccharides) called oligosaccharides. Oligosaccharides are a prebiotic, meaning they act as food for the bacteria in the digestive system. Oligosaccharides are a particularly potent nutrient source for the bifidobacterium found in our probiotic powder. Our oligosaccharides come naturally from tapioca, which is a starch extracted from the Cassava root.