Rheological and Technological Design of Texture-Modified Food Systems for Dysphagia Management in Amyotrophic Lateral...

Amyotrophic lateral sclerosis (ALS) is frequently accompanied by progressive dysphagia, weight loss, and hypermetabolism, which complicate the maintenance of adequate nutritional status. For these patients, food systems must not only provide sufficient energy and protein within a limited volume but also exhibit textural and rheological properties that support safe swallowing. This review analyzes technological and rheological approaches to the design of texture-modified food systems for nutritional support in ALS. Particular attention is given to apparent viscosity, shear-thinning behavior, yield stress, structural homogeneity, and storage stability as parameters affecting bolus formation, swallowing safety, and product performance. The relevance of the International Dysphagia Diet Standardization Initiative framework for classifying food textures and liquid consistencies is also considered. The review further examines the functional and technological roles of animal- and plant-based raw materials, including regional raw materials, in the formulation of energy-dense and structurally stable foods. Proteins, lipids, hydrocolloids, starch gels, and polysaccharide networks are discussed as key components for controlling texture, viscosity, gelation, emulsion stability, and nutritional density. Technological strategies such as homogenization, emulsification, protein-based structuring, hydrocolloid thickening, high-pressure homogenization, and 3D food printing are considered in relation to their potential for developing safe, acceptable, and locally adaptable products for patients with ALS-related dysphagia. The findings highlight the need to integrate food texture science, rheological control, nutritional adequacy, sensory acceptability, and regional availability in the development of clinically relevant texture-modified foods.