Texture Design, Reconstitution, and Rheological Control in Powdered Food Systems for Dysphagia: A Critical Integrative Review

Abstract

Powdered products for dysphagia are often discussed primarily in clinical terms, yet their performance depends on how texture develops during reconstitution and oral processing. In these systems, wetting, dispersion, hydration, hydrocolloid-matrix interactions, resting time, temperature, and salivary exposure jointly determine whether the prepared bolus will be homogeneous, stable, and functionally appropriate at the time of swallowing. This critical integrative review examines powdered foods for dysphagia from a texture design perspective and brings together evidence on the clinical management of dysphagia, IDDSI implementation, shear and extensional rheology, tribology, powder architecture, and reconstitution science. Electronic searches were conducted in PubMed/MEDLINE, Scopus, Web of Science, and ScienceDirect, with backward and forward citation tracking to capture seminal and recent studies. Taken together, the literature shows that liquids classified within the same IDDSI level may differ materially in flow curve profile, viscoelastic recovery, lubrication, and sensory load, whereas studies on powders show that particle size, agglomeration, porosity, surface composition, solids loading, and mixing protocol govern wetting, dispersion, and structural uniformity. In nutrient-dense matrices, such as systems containing cocoa, dairy ingredients, and fibers, thickener performance is matrix- and time-dependent; therefore, the same nominal thickener dose does not guarantee equivalent oral behavior across different products. The reviewed evidence supports a formulation-driven development agenda in which powder architecture, hydrocolloid choice, preparation instructions, and functional texture verification are optimized in an integrated way. Reconstitutable powders are not inherently superior to ready-to-use products, but they may provide a promising platform for standardization, logistical flexibility, and nutritional densification when reconstitution and oral texture are treated as parts of the same system.