Edible oleogels as solid fat alternatives: Composition and oleogelation mechanism implications

Area of Science:

• Food Science
• Materials Science
• Nutritional Science

Background:

• Growing health concerns regarding trans-fats and saturated fats necessitate healthier fat alternatives.
• Oleogelation, a method to structure liquid oils, presents a promising strategy for creating healthier food ingredients.
• Current limitations of oleogels include softer textures and poorer plasticity compared to traditional solid fats.

Purpose of the Study:

• To review and synthesize current knowledge on oleogel composition and structure-function relationships.
• To elucidate the impact of oleogelators, oil phases, and gelation mechanisms on oleogel properties.
• To provide insights for the rational design of oleogel-based food products with desirable functionalities.

Main Methods:

• Comprehensive literature review of research published within the last decades.
• Analysis of factors influencing oleogelation, categorized into oleogelator, oil phase, and gelation mechanism.
• Synthesis of information on the effects of composition and mechanism on oleogel structure and functionality.

Main Results:

• Oleogel properties are significantly influenced by the chemical composition and molecular structure of oleogelators.
• The triacylglycerol (TAG) composition and minor components of the oil phase play a crucial role in oleogel formation.
• Different oleogelation mechanisms lead to varied structures and functionalities in the final oleogel product.

Conclusions:

• Optimizing oleogel functionality requires careful selection of oleogelators, oil phases, and gelation strategies.
• Further understanding of these factors will enable the development of improved oleogel-based products.
• Oleogels hold potential for reducing saturated fat content in various food applications, such as meat, spreads, and confectioneries.