By: Fiber Citrus® Scientific Development Team
Introduction
Fermented dairy products must maintain a stable gel structure and clean visual appearance throughout shelf life. Whey separation (syneresis) is one of the most frequent quality defects in yogurts, petit suisse, and kefir, often creating a “watery” perception that negatively impacts repurchase intent. LactoSave® was developed as a functional citrus-based matrix for dairy, designed to improve moisture retention and reinforce protein network cohesion to reduce syneresis and stabilize texture after fermentation.
1. The Technical Challenge
Fermented dairy gels are formed by protein aggregation and network formation. After fermentation, gels can continue to reorganize, leading to contraction and water expulsion. This instability is intensified by formulation changes (fat reduction, protein optimization), processing variability, and storage conditions. The challenge is to preserve gel integrity and minimize whey-off without relying on complex multi-additive stabilizer systems that can compromise label appeal and sensory quality.
2. The SAVE® Solution: Structuring the Dairy Matrix via Citrus Fiber
LactoSave® functions as a physical and structural stabilizer and as a body/texture agent. By improving water retention and strengthening the continuous phase, it supports a more cohesive protein network and reduces the driving forces for post-fermentation water expulsion. In dairy applications, this matrix-driven approach can reduce syneresis by up to 90% after 7 days, maintaining a firm texture and clean visual appearance.
3. Mechanism of Action Inside the System
LactoSave® acts through combined colloidal effects:
- Hydration and moisture retention: citrus-fiber fractions bind water, reducing free-water mobility and limiting expulsion under storage.
- Matrix cohesion support: the structured network improves internal gel stability, helping the protein matrix remain uniform rather than contracting aggressively.
- Physical stabilization: improved continuous-phase structure reduces micro-separation tendencies, supporting consistent texture and shine.
4. Practical Results Observed in Industry
In fermented systems, improved post-fermentation stability translates into:
- reduced whey-off and cleaner surfaces,
- firmer, more consistent texture,
- improved consumer perception of quality,
- greater robustness when fat or solids are adjusted for cost and nutrition targets.
Conclusion
LactoSave® improves fermented dairy stability by retaining moisture and reinforcing protein network cohesion, reducing syneresis and preserving clean texture throughout shelf life. This matrix-based approach supports stable, scalable fermented dairy products aligned with modern clean-label and cost-pressure realities.
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