The type taxonomy of the Dietary Fiber Supplement market comprises four core categories: Soluble Fiber, Insoluble Fiber, Prebiotic Fiber, and Synthetic/Functional Fiber. Soluble Fiber (e.g., psyllium, beta‑glucan) dissolves in water to form gel‑like structures, supporting cholesterol reduction and glycemic moderation; it represents the largest share of product formulations due to its multifunctional health claims. Insoluble Fiber (e.g., wheat bran, cellulose) adds bulk to stool, primarily serving Digestive Health applications and contributing significantly to the market’s volume‑based segment. Prebiotic Fiber (e.g., inulin, fructooligosaccharides) selectively stimulates beneficial gut microbiota, aligning with emerging microbiome‑focused product lines and driving premium pricing. Synthetic/Functional Fiber (e.g., polydextrose, resistant maltodextrin) is engineered for specific functional attributes such as low caloric value or enhanced stability, supporting niche applications across all four uses. This market taxonomy clarifies how each fiber type adds distinct functional value, influencing formulation strategies and overall market dynamics.