Lysozyme for antimicrobial control in food systems
When spoilage bacteria shorten shelf life, lysozyme from hen egg white offers a proven, food-grade way to control Gram-positive contamination.
In industrial food processing, microbial control is essential to product quality, shelf life, and compliance. Lysozyme, a natural antibacterial enzyme classified under EC 3.2.1.17, provides targeted inhibition of Gram-positive bacteria without harsh chemical preservatives. Sourced from hen egg white (HEW), it hydrolyses the β-(1,4)-glycosidic bonds in peptidoglycan, weakening bacterial cell walls and causing lysis. This mode of action underlies its effectiveness against Clostridium in cheese, lactic acid bacteria in wine, and spoilage organisms in meat and seafood. In dairy, it is a trusted tool for preventing late blowing in semi-hard and hard cheeses. In wineries, it offers an alternative to sulfites for controlling malolactic fermentation. Processed meat and seafood processors use it within brines, blends, or surface dips to extend microbial stability. It is also incorporated into edible coatings and active packaging films to protect chilled, ready-to-eat foods. Technically, HEW lysozyme delivers activity between 20,000 and 100,000 U/mg, functions best at pH 6.0–9.0 and 37–50 °C, and is supplied as a white crystalline powder with a 36‑month shelf life when stored sealed, cool, and dry. Pack sizes from 1 kg to 25 kg and multiple food-industry certifications, including E1105 (EU approved), USP/FCC, ISO 9001, HALAL, and KOSHER, make it suitable for regulated production in many markets. For procurement teams, evaluating its fit means matching these specifications to process conditions, target organisms, and compliance requirements for reliable antimicrobial performance at low dosage.
Cheese preservation and late-blowing control
In Gouda, Edam, and other hard cheeses, lysozyme helps suppress Clostridium tyrobutyricum and reduce late blowing defects. Typical use levels depend on milk composition, processing conditions, and target microbiological load, but lysozyme is usually dosed at low ppm levels in the vat or milk stream. It performs best when the process is managed around pH 6.0 to 8.0 and moderate temperatures.
Wine malolactic control
For wineries seeking a non-sulfite antimicrobial aid, lysozyme can limit lactic acid bacteria during fermentation and stabilization. It is typically introduced after evaluating pH, temperature, and desired microbial pressure. Because lysozyme is a protein-based processing aid, technical teams should verify compliance with local rules and trial the dosage under cellar conditions before scale-up.
Processed meat and sausage protection
Lysozyme can support shelf-life extension in cooked meats, sausages, and related prepared products by inhibiting Gram-positive spoilage organisms. It is most effective when integrated into a broader hygiene and cold-chain strategy. Depending on formulation and salt content, processors may apply it in brines, blends, or surface treatments to improve microbial stability.
Active packaging and coated surfaces
When incorporated into edible films or coating systems, lysozyme adds antimicrobial function directly at the product surface. This is useful for cheese blocks, sliced meat, and other chilled foods where surface contamination drives spoilage. Packaging developers usually evaluate release profile, activity retention, and compatibility with other film-formers before selecting a dosage range.
| Parameter | Value |
| Source organism | Hen egg white (HEW) |
| Activity range | 20,000 – 100,000 U/mg (Micrococcus lysodeikticus assay) |
| Optimal pH | 6.0 – 9.0 |
| Optimal temperature | 37 °C – 50 °C |
| Appearance / shelf life | White crystalline powder; 36 months sealed, cool, dry |
Frequently Asked Questions
What is lysozyme, and why is it used in B2B processing?
Lysozyme is an antibacterial enzyme classified under EC 3.2.1.17 that cleaves specific bonds in bacterial peptidoglycan, making it effective against many Gram-positive organisms. In B2B food processing, it offers targeted microbial control without changing product flavor or texture when correctly applied. Procurement teams often choose HEW lysozyme for cheese, wine, meat, seafood, and packaging projects where a validated food-grade antimicrobial is needed. Its value lies in low-dose efficacy, well-documented activity, and established regulatory acceptance.
Where is lysozyme found naturally?
Lysozyme is found in several biological sources, but the most common commercial source for industrial use is hen egg white. It can also be detected in human tears, saliva, and milk, but these are not viable for large-scale supply. HEW lysozyme is preferred commercially for its consistent activity, scalability, and clear documentation for food and technical applications.
What are lysozymes used for in cheese production?
In cheese, lysozyme’s main role is preventing late blowing caused by Clostridium spores, especially in semi-hard and hard varieties. It helps maintain quality during ripening and storage by reducing gas-forming spoilage. Dosage depends on milk quality, microbial load, and process design, but the enzyme is generally applied at low concentrations. It works best alongside strong hygiene, temperature control, and proper fermentation management.
What dosage and process conditions are typically used?
Dosage is application-specific, but lysozyme is most often used at low ppm levels in food systems rather than high inclusion rates. Performance is generally optimal in the pH 6.0–9.0 range, with best activity between 37 °C and 50 °C. In dairy, wine, meat, or seafood processing, technical teams should validate dose, contact time, and matrix compatibility through pilot trials before commercial rollout.
Is HEW lysozyme suitable for regulated production?
Yes. Hen egg white lysozyme is widely used in regulated food manufacturing, subject to local labeling and processing-aid rules. Key checks include origin, activity specification, microbiological quality, certifications, and intended market approval. This product is supplied with E1105 (EU approved), USP/FCC, ISO 9001, HALAL, and KOSHER certifications, in packs from 1 kg upward, and should be confirmed for compliance in the destination market.
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