What are the main commercial uses for polysaccharides?

The commercial uses of polysaccharide products can be broken down into these three categories: 

• Food: used as a refined gum or concentrate product used to modify texture, suspend ingredients, alter rheology, and amplify nutritional value. Examples include adding pectin as a dietary fiber, corn starch to smooth out the mouth feel of chocolate milk, and xanthan gum to stabilize low-pH viscosity in salad dressings. 
• Pharmaceuticals & Cosmetics: used for similar texture and rheological purposes as with food, as well as to provide some therapeutic benefits. Examples include using alginate to bind with calcium for antacid properties, fucoidan to act as a blood anticoagulant, and dextran as an inert plasma thickener. 
• Heavy Industrial: used for structural and physical property benefits in a wide range of fluid, solid, and biotech applications. Examples include using sodium alginate to bind dyes in cotton textile printing, guar gum to add viscosity in fracking fluids, and chitin for bolstering heavy metal separation.