Shelf-Life Extension of Paneer Using Natural Preservatives

Abstract

Paneer, the fresh acid-coagulated cheese of South Asia, is moist, rich in protein and fat, and handled by hand after cooking, so it spoils quickly even under refrigeration. Interest in replacing or reducing chemical preservatives with natural ones, namely bacteriocins such as nisin, antifungal natamycin, plant essential oils and extracts, protective lactic acid bacteria and chitosan films, has grown with consumer demand for simpler labels. This narrative review asks how far the published literature supports using such agents to extend the shelf life of paneer, and it reports no new data. Work on paneer itself is thin, so the review draws mainly on soft and fresh cheeses and on laboratory studies of the agents. Three themes emerge. Activity in culture medium is routinely larger than activity in a food, because fat, protein and low water activity protect microbes and bind the active compounds. Each agent covers part of the spoilage and safety spectrum only, which favours combinations, ideally placed alongside good hygiene, cold storage and packaging. Doses that preserve are sometimes doses that change flavour. The review concludes that natural preservatives are a credible part of a multi-barrier approach but that paneer-specific, sensory-tested and properly replicated storage trials are still needed, and it outlines what such trials should report.