HiSiaddi is an innovative foreign trade service provider driven by both technology transformation and foreign trade business. We have established a "1+2+3+4=1" service system and can supply ε-polylysine sourced directly from multiple well-known original manufacturers.
As a foreign trade enterprise with independent R&D capabilities, HiSiaddi has repeatedly leveraged technical cooperation with manufacturers and accurate insight into market demands to propose ε-polylysine formula optimization schemes and application improvement suggestions. Below is a case study of HiSiaddi’s consulting service on ε-polylysine formula optimization.
Please contact HiSiaddi customer service if you require more formula optimization consulting services.
The client is RoyalDairy of the Netherlands, a century-old European group specializing in premium cheese and organic dairy products. Its core product lines include premium Brie cheese, organic Cheddar cheese, additive-free cream cheese and complementary cheese foods for infants, sold to high-end supermarkets and Michelin restaurants across the Netherlands, Belgium and Luxembourg. The enterprise strictly complies with four major standards: EU EFSA, EC 1333/2008, EU Organic and Clean Label. It imposes stringent requirements on ε-polylysine (ε-PL): high purity with minimal impurities, high heat resistance, compatibility with high-fat/high-salt systems, and zero negative impact on cheese flavor and texture. This client belongs to the high-end segment with extreme sensitivity to technical performance, zero tolerance for flavor defects and strict requirements for mass production stability.
In March 2026, the client encountered three fatal technical problems during mass production of organic cream cheese (35% fat, 1.2% salt, pH 5.4–5.8) after adopting conventional domestically produced ε-PL (92% purity, 4200 Da molecular weight):
1. Failed bacteriostasis & excessive mold growth: Mold including Penicillium and Aspergillus appeared within 7 days of shelf life, with total colony count exceeding EU standards by 3 times, leading to a 25% batch rejection rate;
2. Flavor deterioration & bitter taste: Native cheese fermentation flavor was masked, leaving a bitter and astringent aftertaste, triggering a sharp surge in complaints from high-end consumers;
3. Damaged texture & excessive whey separation: Increased whey precipitation, loose texture and poor spreadability, failing to meet the fine, creamy texture requirements of premium cream cheese.
The client’s technical team spent two weeks troubleshooting without identifying root causes, optimizing formulas or resolving mass production stability issues. The original supplier only recommended increasing the addition dosage, which would further exacerbate flavor and texture defects. The client urgently entrusted HiSiaddi with the project, requiring full completion of technical diagnosis, root cause analysis, formula optimization, process adjustment and lab-scale verification within 7 days to completely resolve the three technical issues and restore stable mass production.
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Sharp decline of bacteriostatic activity in high-fat high-salt systems Cream cheese contains 35% fat and 1.2% salt. Conventional 4200 Da ε-PL features strong water solubility and poor liposolubility; it disperses unevenly in high-fat systems and becomes encapsulated by fat molecules, resulting in insufficient effective bacteriostatic concentration. High-salt environments further disrupt the surface charge of ε-PL molecules, slashing bacteriostatic activity from 95% to below 40% and failing to inhibit mold proliferation.
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Flavor deterioration and bitter taste induced by low-purity impurities Conventional ε-PL only reaches 92% purity, containing residual bacterial protein, fermentation byproducts and high free amino acid content (2.5%). During cheese fermentation at 28℃ and cold storage at 4℃, impurities gradually decompose to produce amines and bitter peptides, creating bitter, astringent off-notes and masking the native creamy cheese flavor. Meanwhile, impurities undergo Maillard reactions with milk protein and lactose in cheese to generate foreign odor substances, violating Clean Label standards.
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Poor molecular weight compatibility damaging cheese texture stability Conventional 4200 Da ε-PL has a large molecular size and high charge density, triggering strong electrostatic adsorption with casein micelles in cheese, leading to casein aggregation, whey precipitation and loose texture. Excessively long molecular chains also disrupt fat globule structures, eliminating creamy spreadability and creating rough mouthfeel.
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HiSiaddi assembled a dedicated task force consisting of ε-PL application specialists, cheese process engineers and microbial inspectors. The team analyzed the client’s formula, production processes, defective batch samples and original supplier product parameters to complete full-dimensional diagnosis within 24 hours:
1. Product side issues: Low purity (92%), excessive molecular weight (4200 Da) and high free amino acid content (2.5%) of conventional ε-PL introduce flavor defects and poor compatibility with high-fat systems;
2. Formula side issues: Insufficient addition dosage of 0.03% fails to offset activity attenuation in high-fat high-salt environments; absence of synergistic agents results in a narrow bacteriostatic spectrum for single ε-PL use;
3. Process side issues: Improper addition timing (added before fermentation) leads to 50% loss of ε-PL activity via decomposition by fermentation bacteria; excessive mixing temperature (60℃) destroys ε-PL molecular structures.
Core conclusion: The superposition of incorrect product selection, unbalanced formula ratios and improper addition processes triggered failed bacteriostasis, flavor deterioration and texture damage. The solution required product replacement, formula optimization and process adjustment, all to be finalized within 7 days.
Discontinue the original conventional product and coordinate with Jiangsu Yiming Bio, a premium customized ε-PL manufacturer with complete EU certifications, to adopt the high-purity medium-molecular-weight model PL-350:
· Purity: 98.2% (≥98%, nearly zero impurities)
· Molecular weight: 3500 Da (narrow distribution optimized for high-fat systems)
· Free amino acids: 0.3% (≤0.5%, no bitter taste precursors)
· Core properties: 40% improved liposolubility, moderate charge density, high heat resistance (stable up to 70℃), fully compatible with high-fat high-salt dairy products.
1. Synergistic compound formula (synergistic bacteriostasis to reduce single-ingredient dosage)
· ε-PL (PL-350): 0.025% (0.005% dosage reduction to minimize flavor impact)
· Natamycin: 0.015% (targeted mold inhibition, lifting overall bacteriostatic rate by 30% when compounded with ε-PL)
· Citric acid: 0.1% (adjust system pH to 5.5 to stabilize ε-PL charge and enhance activity)
1. Optimization logic Medium-molecular-weight ε-PL with improved liposolubility disperses uniformly across the 35% fat system without fat encapsulation; natamycin specifically suppresses mold growth to resolve shelf-life mold issues; citric acid stabilizes pH to counteract charge disruption caused by high salt, restoring bacteriostatic activity above 92%; reduced ε-PL dosage cuts impurity introduction and completely eliminates bitter taste.
1. Addition timing: Shift from "pre-fermentation addition" to post-fermentation, post-curd cutting and pre-whey removal addition to avoid decomposition by fermentation bacteria, lifting activity retention rate from 50% to 90%;
2. Mixing temperature: Controlled at 40℃±2℃ (reduced from original 60℃) to prevent high-temperature damage to ε-PL molecular structures while protecting casein and fat globule integrity to avoid loose texture;
3. Stirring speed: Low-speed stirring at 60rpm for 5 minutes to ensure uniform dispersion without breaking fat globules, maintaining creamy cheese texture.
Round 1 (2 days): Product replacement single-factor test Only PL-350 added at 0.03% without compounding agents; Results: 75% bacteriostatic rate (still insufficient), no bitter flavor, improved texture with 50% less whey precipitation.
Round 2 (2 days): Compound formula optimization Adopt formula of 0.025% ε-PL + 0.015% natamycin + 0.1% citric acid; Results: 93% bacteriostatic rate (≥90% threshold), no mold growth, pure native creamy flavor without bitterness, creamy texture with zero whey precipitation and excellent spreadability.
Round 3 (1 day): Process parameter standardization Fixed addition timing (post-curd cutting), temperature (40℃) and stirring speed (60rpm); Results: 100% batch stability with consistent indicators across three replicate trials, fully meeting EU standards and the client’s premium quality requirements.
1. Compliance documents: Supply English COA for PL-350, EU EFSA filing certificate, EU Organic certification, Non-GMO statement and batch traceability reports, fully compliant with EU high-end dairy product regulations;
2. Technical handover: HiSiaddi technical specialists held dual video and on-site meetings with the client’s production, R&D and quality control departments to elaborate on:
o Molecular characteristics of PL-350, compatibility principles for high-fat systems and impurity control standards;
o Synergistic bacteriostatic mechanisms of compound formulas, flavor protection logic and precise dosage control;
o Critical control points of process parameters, operational details and abnormal handling protocols;
o Pre-judgment of common mass production issues, daily testing standards and batch control guidelines.
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Thorough resolution of failed bacteriostasis Shelf life extended from 7 days to 45 days with zero mold and yeast growth; total colony count ≤100 CFU/g (EU standard threshold ≤1000 CFU/g), batch rejection rate reduced from 25% to 0%.
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Complete elimination of flavor deterioration Cheese delivers rich native creamy flavor with pure, clean aftertaste free of bitterness and foreign odors; high-end consumer complaints dropped to zero, passing EU Clean Label sensory certification.
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Full restoration of damaged texture Cheese features creamy, spreadable texture with no whey precipitation and stable structural integrity, meeting premium cream cheese quality standards; texture score raised from 72 to 95 (full score 100).
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Stable mass production & cost optimization The client resumed full-capacity production with daily output increased by 30%; ε-PL dosage cut from 0.03% to 0.025%, lowering per-ton production costs by 12%. Combined savings from eliminated batch rejection lifted comprehensive economic benefits by 28%.
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High client recognition & binding long-term technical strategic cooperation Client feedback: "HiSiaddi is our most professional and trustworthy Chinese food additive technical partner! Faced with industry-wide technical bottlenecks including failed bacteriostasis, flavor deterioration and texture damage in high-fat high-salt premium cream cheese, they completed precise diagnosis, product upgrade, formula optimization, process adjustment and lab verification within 7 days to completely eliminate mass production pain points. They not only helped us recover massive economic losses but also upgraded product quality and market competitiveness, justifying deep long-term cooperation."
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The two parties subsequently signed an annual procurement agreement for 80 tons of high-end ε-PL. The client entrusted HiSiaddi with technical R&D, formula optimization, process guidance, quality control and compliance support for all dairy anti-corrosion systems, appointing HiSiaddi as its exclusive food additive technical service provider in China. HiSiaddi will develop exclusive technical support schemes for subsequent new products including premium Cheddar cheese and complementary cheese foods for infants.
When overseas high-end clients adopt ε-polylysine for high-fat high-salt premium dairy products, core technical pain points include poor liposolubility of standard products, flavor defects induced by low-purity impurities, texture damage from mismatched molecular weight and activity loss caused by improper addition processes. Premium dairy products impose extremely stringent requirements on bacteriostatic efficiency, flavor purity, texture stability and Clean Label compliance; standard off-the-shelf ε-PL products and extensive application methods easily trigger systemic mass production crises.
HiSiaddi’s core competitive advantages lie in "in-depth expertise in ε-PL molecular characteristics, comprehensive mastery of premium dairy production processes, precise matching of product models, scientific compound formula design, optimized production processes and end-to-end technical services": We fully grasp the application scenarios and compatibility logic of ε-PL products with varying molecular weights and purity grades to accurately match high-fat high-salt systems; we possess full expertise across dairy fermentation, curdling and ripening processes to optimize addition timing and temperature; we further reduce ingredient dosage via synergistic compounding to protect flavor and stabilize texture, eliminating all technical risks within 7 days, restoring stable mass production and upgrading product quality. We help clients break technical bottlenecks, consolidate leading positions in premium markets and enhance global brand competitiveness.
Please contact HiSiaddi customer service if you require more formula optimization consulting services.
+86-13120989737 
info@hisiaddi.com 
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