Maillard Reaction Products and Their Functional Properties

The Maillard reaction describes the non-enzymatic condensation of reducing sugars with amino acids, peptides or proteins under thermal treatment, leading to a complex cascade of intermediates and end-products collectively known as Maillard reaction products (MRPs). These compounds underpin the characteristic browning, aroma and flavour of many cooked and processed foods, and exert a broad spectrum of functional effects beyond sensory appeal. At early stages, Schiff bases and Amadori rearrangement products form; subsequent dehydration, fragmentation and polymerisation yield melanoidins and volatile compounds. Such diversity confers antioxidant and metal-chelating capacity, interfacial activity in emulsions, techno-functional improvements in foaming or gelling, and antimicrobial or prebiotic effects. Key parameters—substrate identity (sugar type, amino acid profile), pH, temperature, reaction time and water activity—govern MRP yield and functionality. Globally, MRPs are exploited to enhance food quality, extend shelf life, modulate nutritional value and even serve in pharmaceutical delivery systems, while emerging research explores tailored MR conditions to maximise desirable bioactivities and minimise formation of potentially harmful advanced glycation end-products.

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Maillard Reaction Products and Their Functional Properties publication trend

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Technical terms

Maillard reaction: A heat-driven chemical reaction between reducing sugars and amino groups in proteins or amino acids, resulting in flavour and colour compounds.

Amadori rearrangement product: A stable intermediate formed when a Schiff base undergoes molecular rearrangement early in the Maillard reaction.

Melanoidins: High-molecular-weight, brown polymers formed in the advanced stages of the Maillard reaction, contributing to colour and antioxidant capacity.

Free-radical scavenging: The ability of a compound to neutralise reactive free radicals, thus inhibiting oxidative chain reactions in foods or biological systems.

Emulsion: A system of two immiscible liquids (typically oil and water) in which one phase is dispersed as droplets within the other, often stabilised by surface-active molecules such as proteins or MRPs.

References

1. Insights into flavor and key influencing factors of Maillard reaction products: A recent update. Frontiers in Nutrition (2022).
2. Maillard reaction products as functional components in oil-in-water emulsions: A review highlighting interfacial and antioxidant properties. Trends in Food Science & Technology (2022).
3. A Literature Review on Maillard Reaction Based on Milk Proteins and Carbohydrates in Food and Pharmaceutical Products: Advantages, Disadvantages, and Avoidance Strategies. Foods (2021).