Food preservatives: natural or synthetic?

Food spoilage is a significant global issue, with approximately 31% of the food supply being wasted, resulting in economic and environmental problems worldwide. While synthetic preservatives effectively extend shelf life, they pose health risks due to possible carcinogenic properties and adverse effects, leading to a shift toward natural preservation methods. The modern food industry market is shifting from synthetic to natural preservatives, driven by rising consumer demand for clean-label products and concerns about the health risks associated with synthetic additives. These compounds offer multifunctional properties, including antimicrobial, antioxidant, and anti-enzymatic activities, which help inhibit spoilage microbes and maintain food safety and quality standards. This review thoroughly examines the development of food preservation strategies, with a focus on natural alternatives that ensure food safety while meeting consumer expectations for quality and safety. Analysis of the global marketplace reveals that natural food preservatives are experiencing significant growth, with variations in market concentration and adoption patterns across different regions. Plant, animal, and microbial preservatives demonstrate effectiveness comparable to that of synthetic preservatives while addressing safety concerns. This review aims to explore antimicrobial peptides, particularly bacteriocins, their classification, and antimicrobial mechanisms, including membrane disruption and metabolic interference, highlighting their potential applications in various food matrices. Current food challenges include stability, scalability, and regulatory harmonisation. This review highlights the transformative approach involving nanotechnology, hurdle technology, and biotechnological innovations, which could lead to the development of a potential natural preservative for creating sustainable, safe, and consumer-acceptable food preservation systems.