article · Foods
Demand is growing for meat products preserved with safe, natural additives instead of synthetic chemicals. An investigation into the preservative potential of aqueous Moringa oleifera leaf extract examined its impact on ground beef stored at 4 degrees Celsius over 18 days. Concentrations of 0.5 percent, 1 percent, and 2 percent were assessed against both natural spoilage organisms and specific pathogens. The 2 percent extract demonstrated potent antimicrobial activity, notably lowering aerobic plate counts and Enterobacteriaceae counts. It achieved substantial reductions in artificially inoculated Escherichia coli O157:H7, Salmonella enterica Typhimurium, and Staphylococcus aureus by the end of the storage period. Sensory evaluations revealed no detrimental effects on product acceptability, alongside minor improvements in the tenderness and juiciness of the meat. These results highlight the extract as an effective, natural preservative to enhance safety and shelf stability.
Consumers increasingly seek meat products preserved with natural alternatives to synthetic chemical preservatives. Demonstrating that Moringa oleifera leaf extract suppresses dangerous foodborne bacteria such as Salmonella and Escherichia coli without degrading sensory qualities offers a viable path towards cleaner labels. It provides a healthier approach to extending the shelf stability of chilled meat whilst helping maintain critical food safety standards.
This research demonstrates an applied, laboratory-tested natural preservative for meat processors and food manufacturers seeking to replace synthetic antimicrobial agents. The extract could be formulated into shelf-life extending additives for chilled meat products. While efficacy is proven in controlled 18-day cold storage trials, moving from this applied testing stage to industrial use will require further work on extraction standardisation, regulatory compliance, and cost-effective commercial scale production.
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Consumers nowadays are becoming more aware of the importance of using only meat products containing safe and natural additives. Hence, using natural food additives for extending the shelf life of meat along with delaying microbial growth has become an urgent issue. Given the increasingly popular view of <i>Moringa oleifera</i> leaves as a traditional remedy and also the scarcity of published data concerning its antimicrobial effect against foodborne pathogens in meat and meat products, we designed the present study to investigate the antimicrobial effect of <i>Moringa oleifera</i> leaves aqueous extract (0.5%, 1%, and 2%) on ground beef during refrigerated storage at 4 °C for 18 days. MLE revealed potent antimicrobial properties against spoilage bacteria, such as aerobic plate count and Enterobacteriaceae count. MLE 2% showed a significant (<i>p</i> < 0.01) reduction in the counts of <i>E. coli</i> O157:H7, <i>Salmonella enterica</i> serovar Typhimurium, and <i>Staphylococcus aureus</i> artificially inoculated to ground beef by 6.54, 5.35, and 5.40 log<sub>10</sub> CFU/g, respectively, compared to control, by the 18th day of storage. <i>Moringa</i> leaves extract (MLE) had no adverse effect on the overall acceptability and other sensory attributes; moreover, it induced a slight improvement in the tenderness and juiciness of treated ground beef, compared to the control. Therefore, MLE can be used as a healthy, natural, and safe preservative to increase meat products' safety, quality, and shelf stability during cold storage. A promising approach for using natural food additives rather than chemical preservatives could begin new frontiers in the food industry, as they are more safe and do not constitute health risks to consumers.
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DOI: 10.3390/foods12040766
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