Protein-Polysaccharide Particles for Colloidal Stability

Interactions between whey proteins and polysaccharides, in particular the formation of food-grade soluble complexes, are of interest because of potential functional and health benefits. A specific application that has not received much attention is the use of complexes for enhanced colloidal stability of protein sols, such as protein-containing beverages. In beverages, the primary goal is the formation of complexes that remain dispersed after thermal processing and extended storage. This review highlights recent progress in the area of forming whey protein–polysaccharide soluble complexes that would be appropriate for beverage applications. Research in this area indicates that solublecomplexes can beformed and stabilized that arereasonably small in size and possess a large surface charge that would predict colloidal stability. Selection of specific proteins and polysaccharides can be tailored to desiredconditions.Theprincipalchallengesinvolveovercomingrestrictions on protein concentration and ensuring that protein remains bioavailable.