Study on Starch-Based Thickeners in Chyme for Dysphagia Use

Area of Science:

• Food Science
• Rheology
• Nutritional Science

Background:

• Dysphagia diets require careful food design for swallowing safety and nutritional value.
• Starch-based thickeners are commonly used in dysphagia food formulations.
• Understanding starch properties is crucial for developing effective dysphagia foods.

Purpose of the Study:

• To investigate rheological, textural, and swallowing properties of various maize and tapioca starches.
• To assess the suitability of these starches for dysphagia diets based on IDDSI standards.
• To explore the impact of starch modification (pregelatinised, acetylated, phosphorylated) on food properties.

Main Methods:

• Rheological testing (viscosity, thixotropy, viscoelasticity) of starch samples.
• Textural analysis (hardness, adhesion, cohesion) of starch-based foods.
• Evaluation of swallowing behavior and adherence to IDDSI food grading.

Main Results:

• Most starches met IDDSI food grade 3, exhibiting beneficial shear-thinning behavior.
• Pregelatinised starch samples were IDDSI grade 2.
• Modified starches demonstrated good structural recovery, stability, fluidity, and desirable textural properties (low hardness/adhesion, high cohesion).

Conclusions:

• The evaluated starches possess suitable properties for dysphagia diet foods.
• Starch modifications influence rheological and textural characteristics, impacting food design.
• Findings provide a foundation for creating novel, safe, and nutritious foods for individuals with dysphagia.