3D Food Printing Applications Related to Dysphagia: A Narrative Review

Area of Science:

• Food Science
• Nutritional Science
• Gerontology

Background:

• Dysphagia impairs swallowing, often affecting the elderly and leading to malnutrition due to restrictive texture-modified diets.
• Texture-modified diets are crucial for dysphagia management but are often unappealing, impacting patient intake and nutritional status.
• Malnutrition is a significant concern in the elderly with dysphagia, highlighting the need for improved dietary solutions.

Purpose of the Study:

• To explore the potential of 3D food printing as a method to enhance the appeal of texture-modified diets for individuals with dysphagia.
• To assess the suitability of 3D-printed foods for dysphagia diets according to the International Dysphagia Diet Standardization Initiative (IDDSI) standards.
• To investigate the nutritional implications and potential mitigating strategies for 3D-printed foods in the context of dysphagia.

Main Methods:

• Review of current 3D food printing technologies, specifically extrusion-based printing, for food texture modification.
• Analysis of 3D-printed food products (protein and vegetable) against IDDSI texture categories.
• Examination of 4D food printing advancements for enhanced sensory appeal (color change, aroma release).
• Discussion of nutritional concerns related to ultra-processed 3D-printed foods and proposed solutions.

Main Results:

• 3D food printing, particularly extrusion-based methods, can produce protein and vegetable products meeting IDDSI texture requirements.
• 4D food printing offers novel ways to increase food appeal through dynamic sensory properties.
• Nutritional concerns exist regarding the ultra-processed nature of 3D-printed foods, impacting digestion and the gut microbiome.
• Strategies like adding hydrocolloids and probiotics can mitigate negative nutritional effects.

Conclusions:

• 3D food printing presents a promising approach to improve the palatability and intake of texture-modified diets for dysphagia patients, especially the elderly.
• Addressing the ultra-processed nature of 3D-printed foods through formulation adjustments is essential for nutritional benefits.
• Further research and exploration of 3D and 4D food printing technologies are warranted for optimizing dysphagia diets.