Pomegranate Peel Extract Emerges as New Ingredient for Food Preservation Amid Clean Label Challenges

In today's market where consumers increasingly prioritize health and clean labels, food companies are actively seeking safe and efficient natural preservation ingredients. While chemical preservatives remain widely used, they struggle to meet the dual demands for “additive-free” and “sustainable” products. Against this backdrop, natural plant extracts—with their green and safe properties—have emerged as a research hotspot and innovative direction in food preservation.

Pomegranate Peel Extract Powder: Modern Preservation Value of a Millennia-Old Medicinal and Edible Plant

Pomegranate (Punica granatum L.), an ancient plant with both medicinal and edible uses, yields dried fruit peel—pomegranate peel—rich in various bioactive compounds including tannins (polyphenols), flavonoids, alkaloids, and organic acids. Recent studies reveal that pomegranate peel extract not only retains its traditional medicinal value but also exhibits exceptional antioxidant and broad-spectrum antibacterial properties, establishing a scientific foundation for its application in food preservation.

Pomegranate peel extract raw material exhibits significant inhibitory effects against various common foodborne microorganisms, including Gram-positive bacteria, Gram-negative bacteria, and fungi. Its inhibitory action against pathogenic bacteria such as Staphylococcus aureus is particularly pronounced. Its antibacterial activity primarily stems from natural tannin components (such as punicalagin). These compounds inhibit microbial growth while simultaneously delaying lipid oxidation and preserving food quality. With optimized extraction techniques and deepening application research, pomegranate peel extract has emerged as an ideal raw material for replacing chemical preservatives and driving the natural transformation of the food industry.

Green Spring Technology Pomegranate Peel Extract Raw Material: Providing a Natural Solution for Food Preservation

Leveraging advanced extraction techniques and rigorous quality control systems, Green Spring Technology delivers high-purity, high-potency pomegranate peel extract ingredients. Our products effectively extend food shelf life, reduce spoilage-related losses, and meet consumer demand for clean-label and natural health products. By utilizing Green Spring Technology's pomegranate peel extract, you can not only enhance your product's market competitiveness but also contribute to advancing the food industry toward a more natural and sustainable direction.

1. Pomegranate Peel Extract Exhibits Broad-Spectrum Antibacterial Properties

Research indicates that pomegranate peel extract demonstrates excellent inhibitory effects against various common foodborne microorganisms, including Gram-positive bacteria, Gram-negative bacteria, and fungi. Its antibacterial activity significantly surpasses that of other pomegranate parts, primarily attributed to abundant polyphenolic compounds—especially tannins like punicalagin and punicalagin tannin. As polyphenol purity increases, antibacterial efficacy further intensifies, highlighting its fundamental material advantages for natural preservation applications.

Extraction processes significantly influence pomegranate peel extract's antimicrobial performance. Ethanol extracts exhibit strong dose-dependent antibacterial effects at appropriate concentrations. Furthermore, synergistic effects are observed when extracts are combined with specific metal salts, opening possibilities for developing composite natural preservatives. Additionally, studies reveal excellent bactericidal efficacy in aerosol applications, expanding its potential for cleaning and disinfection in food processing environments (e.g., workshop air, equipment surfaces).

Leveraging its outstanding broad-spectrum antibacterial properties, pomegranate peel extract can be widely applied across diverse food systems to effectively delay microbial-induced spoilage and significantly extend shelf life. Its natural and safe characteristics align with the growing clean label trend, meeting consumer demand for healthy, sustainable foods while helping manufacturers develop more competitive products.

2   Extraction of Antimicrobial Compounds from Pomegranate Peel Extract

Multiple studies indicate that pomegranate peel extract, as a natural plant-derived active ingredient, possesses significant antimicrobial properties. Its extraction process and conditions critically influence antibacterial efficacy. Different extraction methods and solvent choices significantly impact antimicrobial activity, providing scientific basis for food preservation applications.

Research indicates that modern extraction techniques like microwave-assisted extraction and ultrasonic extraction more effectively preserve antibacterial components in pomegranate peel compared to traditional reflux extraction. Among these, extraction using 60% ethanol as the solvent yields particularly outstanding results, demonstrating strong inhibitory effects against multiple common foodborne pathogens. For instance, under optimized extraction conditions (e.g., 385W power, 1:25 solid-to-liquid ratio, 120s extraction time), the resulting polyphenolic extract achieved minimum inhibitory concentrations (MICs) of 0.80, 1.60, and 0.40 g/mL against Staphylococcus aureus, Proteus vulgaris, and Bacillus cereus, respectively.

Furthermore, tannin components in pomegranate peel exhibited promising antibacterial potential. Tannins extracted via optimal processing produced a 15.9 mm inhibition zone against Staphylococcus aureus and demonstrated moderate inhibitory effects on certain Gram-negative bacteria. Among different solvent extracts, the 60% ethanol extract exhibited the strongest comprehensive antibacterial activity, effectively inhibiting multiple microorganisms including Escherichia coli and Candida albicans.

Drying methods also influence the final product's antimicrobial efficacy. Mechanical drying (e.g., microwave drying and 50°C oven drying), characterized by rapid and high-temperature instantaneous processing, outperforms natural drying. This approach helps reduce polyphenolic oxidation and better preserves antimicrobial activity.

In summary, by optimizing extraction solvents, methods, and drying processes, pomegranate peel extract can serve as an efficient, natural food preservation ingredient. It is suitable for replacing or partially substituting chemical preservatives, meeting market demand for natural, healthy food ingredients under clean label trends.

3 Application of Pomegranate Peel Extract in Food Preservation

As a naturally sourced plant-based active ingredient, pomegranate peel extract has gained prominence as a popular alternative to chemical preservatives due to its exceptional antioxidant and antimicrobial properties. It finds extensive application across multiple food sectors, including dairy products, condiments, fruits and vegetables, vegetable oils, and meat products.

In fruit and vegetable preservation, studies indicate that pomegranate peel extract exhibits significant inhibitory effects against various common spoilage microorganisms. Components extracted using highly polar solvents demonstrate particularly outstanding performance. In strawberry preservation experiments, a combination of 1% pomegranate peel extract and 1.25% chitosan effectively reduced fruit weight loss and softening/rotting rates, slowed nutrient loss, and extended shelf life at room temperature by 1-2 days, exhibiting excellent synergistic preservation effects.

In dairy applications, pomegranate peel flavonoid extracts exhibit broad-spectrum antibacterial properties. Experiments show that adding 10-20 mg/mL of this component significantly inhibits the growth of multiple microorganisms in milk, reduces total colony counts, and slows acidity increase, outperforming the traditional preservative sodium benzoate.

In soy sauce, adding 1.2% pomegranate peel extract inhibits common pathogenic bacteria more effectively than 0.1% sodium benzoate or potassium sorbate, without affecting the product's original flavor, providing a natural preservative solution for the seasoning industry.

In lipid systems, appropriately adding pomegranate peel extract effectively scavenges free radicals, delays oxidation processes, and significantly extends the shelf life of vegetable oils. In meat products, this extract prolongs the refrigerated shelf life of chicken, lamb, and other items by inhibiting lipid peroxidation and microbial growth while maintaining freshness and edible quality.

Multiple studies confirm that pomegranate peel extract, as a multifunctional natural food preservation ingredient, demonstrates excellent application efficacy across diverse food systems, offering the food industry a new raw material option for developing clean-label products.

4  Pomegranate Peel Extract Holds Broad Application Prospects as a Natural Food Preservative Ingredient

Pomegranate peel extract powder, with its broad-spectrum antibacterial and superior antioxidant properties, has become one of the ideal raw materials for developing natural food preservatives. To further advance its innovative applications in the food industry, the following areas warrant focused attention:

Regarding component research, while primary antibacterial compounds like punicalagin and punicalagin tannin have been identified, pomegranate peel extract may contain other synergistic bioactive substances that merit in-depth exploration and analysis. Concurrently, deepening research into its antibacterial mechanisms will provide a more robust theoretical foundation for its scientific application. Furthermore, combining pomegranate peel extract with other compliant chemical preservatives in formulation studies can significantly enhance preservation efficacy while reducing chemical additive usage, aligning with clean label trends.

Green Spring Technology leverages advanced extraction processes to deliver high-purity, high-activity pomegranate peel extract raw materials with the following core advantages:

· Natural origin, meeting modern consumer demands for clean labels and health-conscious products;

· Dual broad-spectrum antibacterial and antioxidant efficacy, suitable for diverse food systems;

· Partially replaces chemical preservatives, supporting product formulation upgrades.

By choosing Green Spring Technology's pomegranate peel extract, customers gain stable, reliable natural preservation solutions that enhance product competitiveness and collectively advance the food industry toward more natural, health-focused directions.

Industry partners are invited to contact us at helen@greenspringbio.com or WhatsApp: +86 13649243917 for samples and technical solutions, collaborating to develop the next generation of natural, healthy foods!

References

[1] Editorial Committee of the Flora of China, Chinese Academy of Sciences. Flora of China (Vol. 52, Book 2) [M]. Beijing: Science Press, 1983: 120-121.

[2] Yang Liping, Yang Yonghong. Research progress on pomegranate peel [J]. Yunnan Traditional Chinese Medicine Journal, 2004, 25 (3) 45-47.

[3] Li Haixia, Wang Zhao. Research progress on the chemical composition and pharmacological activity of plants in the family Punicaceae [J]. Chinese Herbal Medicine, 2002, 33 (8) 765-766.

[4] Dahham S S，Ali M N，Tabassum H，et al.  Studies on Antibacterial and Antifungal Activity of Pomegranate  (Punica  granatum L. ) ［J］.American-Eurasian Journal of Agricul- ture and  Environmental  Sciences ，2010 ，9  ( 3 )   273  -  281.

[5] Fawole O A,Makunga N P，Opara U L.  Antibacterial， antioxidant and tyrosinase-inhibition activities of pomegranate  fruit peel methanolic extract［J］．BMC Complementary and  Alternative Medicine，2012，12  200－225 .

[6] Lu Xueying, Abudulraheemuguli, Li Yanhong, et al. Antioxidant, antibacterial and antitumor activities of the effective part of total polyphenols in pomegranate peel from Xinjiang [J]. Food Science, 2012, 33 (9) 26-30.

[7] Chen Xiaojuan, Gu Zhengyi, Huang Hua, et al. A preliminary study on the antibacterial and anti-inflammatory effects of total polyphenols from pomegranate peel [J]. Northwest Journal of Pharmacy, 2011, 26 (4) 268-270.

[8] Zhou Benhong, Liu Chun, Chen Lei, et al. Study on the sensitivity of tannin components in pomegranate peel to Staphylococcus aureus [J]. Chinese Journal of Pharmacy, 2006, 41 (19) 1510-1510.

[9] Chen Hong, Liu Lei, Wu Run, et al. In vitro antibacterial activity test of pomegranate peel and other traditional Chinese medicine water extracts [J]. Journal of Traditional Chinese Veterinary Medicine, 2009, 28 (2) 53 -55.

[10] Yang Lin, Zhou Benhong. Experimental study on the antibacterial effect of tannins and flavonoids in pomegranate peel [J]. Shizhen National Medicine National Medicine, 2007, 18 (10) 2335-2336.