Soft Matter Physics-Driven Design of Texture-Modified Foods for Geriatric Nutrition.

Area of Science:

• Soft matter physics applied to food science and geriatric nutrition.
• Interdisciplinary approach integrating food engineering, rheology, tribology, and clinical nutrition.

Background:

• Older adults often face dysphagia, malnutrition, and sarcopenia, necessitating specialized dietary interventions.
• Texture-modified foods (TMFs) are crucial for managing swallowing difficulties and ensuring nutritional adequacy in this population.
• Existing approaches often consider clinical needs or processing technologies in isolation.

Purpose of the Study:

• To review and synthesize research on TMFs from a soft matter physics perspective.
• To establish a framework for designing TMFs that enhance swallowing safety, nutritional value, and acceptability for older adults.
• To bridge the gap between material science properties and clinical outcomes in geriatric nutrition.

Main Methods:

• Narrative review of experimental and clinical studies from 2020 onwards.
• Focus on TMFs (gels, emulsions, biopolymer networks) analyzed as soft-matter systems.
• Integration of data on rheology, tribology, microstructure, particle size, 3D printing, and processing techniques.

Main Results:

• Safer food boluses exhibit specific rheological properties: soft, shear-thinning, cohesive, low-adhesive, and extensible.
• Quantitative texture parameters (viscosity, yield stress, moduli) predict swallowability better than qualitative measures.
• Engineered TMFs (protein-polysaccharide gels, emulsion matrices, 3D-printed foods) can meet dysphagia diet standards while enhancing nutrient density and bioavailability.

Conclusions:

• A soft matter physics framework provides actionable design rules for TMFs.
• This approach enables the creation of safer, more palatable, and nutritious foods for older adults with dysphagia.
• Future research should focus on phenotype-specific targets and long-term clinical validation for healthy aging.