Chemical functionality of food additives in sensory design, product stability and food safety: a critical review of mechanisms, evidence and clean‐label innovation

Abstract

Food additives are essential to food processing, contributing to preservation, sensory quality, structural stability and product acceptability. Demand for natural and clean‐label products, together with safety scrutiny, has increased the need to understand how additive chemistry determines technological and sensory performance. This review critically examines the chemical functionality of food additives in relation to food‐matrix interactions, sensory perception, product stability, food safety and clean‐label innovation. The evidence shows that food additives act through antimicrobial, antioxidant, chelating, rheological, emulsifying and sensory mechanisms that influence food stability and consumer‐perceived quality. Organic acids inhibit microorganisms through acidification and metabolic disruption, whereas antioxidants and chelating agents reduce oxidative deterioration. Hydrocolloids modify rheology, water binding, gel formation and mouthfeel, whereas emulsifiers enhance interfacial and structural stability. Glutamates and nucleotide enhancers, including inosinate and guanylate, modulate umami perception through taste‐receptor interactions, linking molecular functionality with sensory response. Colourants influence visual perception and consumer expectations, although their stability is influenced by food‐matrix conditions. Across these applications, additive efficacy depends on the concentration, matrix composition, processing conditions and interactions among ingredients. Natural and clean‐label additives offer promising alternatives to synthetic ingredients, but their technological performance may be constrained by compositional variability, stability, standardization, cost, sensory effects and regulatory requirements. Safety evaluation remains dependent on dose, exposure, susceptible populations and regulatory thresholds. Future research should prioritize matrix‐specific additive design, standardization of natural and bio‐derived ingredients, mechanistic sensory studies, sustainable production, predictive safety assessment, and AI‐assisted formulation to develop additives that are technologically effective, safe, sustainable and acceptable to consumers. © 2026 Society of Chemical Industry.