Encapsulation & Fermentation Polysaccharides
— How biopolymeric carriers stabilize postbiotic metabolites
Postbiotic active ingredients are only as good as their delivery system. Fermentation-based polysaccharide gels and encapsulation technologies determine whether active metabolites truly reach the skin – and what science says about it.
Postbiotic metabolites – including short-chain fatty acids, peptides, and bioactive exopolysaccharides – are considered promising active ingredients for modern skincare in contemporary formulation science. However, their efficacy critically depends on whether they reach the target area of the skin in a stable, bioavailable form. This is precisely where encapsulation strategies and fermentation-based polysaccharide gels come into play.
In cosmetic chemistry, the combination of biotechnological fermentation and tailored encapsulation technology is comparatively new but rapidly gaining scientific importance. Polysaccharide matrices generated by microbial fermentation – such as hyaluronic acid precursor complexes, pullulan, or bacterial cellulose – not only offer structural stability but can also function as biologically compatible carriers for sensitive postbiotics. The following article illuminates the underlying mechanisms, relevant manifestations of unstable active ingredient systems, and the potential of these technologies for daily skincare routines.
Biopolymer Matrix: Protection, Adhesion, and Controlled Release
The stabilization of postbiotic metabolites through encapsulation and polysaccharide gels is based on several synergistic principles. While classic emulsion systems often become unstable at the interface between hydrophilic and lipophilic phases, biopolymer carrier structures enable precise control over release kinetics and adhesion to the stratum corneum. Bioactive Infusion Complex™, as a formulation science concept, combines precisely these approaches: biotechnologically derived carrier matrices with targeted active ingredient release.
Fermentation-based polysaccharides such as hyaluronan oligomers, β-glucans, or bacterial levan form three-dimensional gel networks in which postbiotic metabolites – such as lactic acid derivatives, short peptide chains, or ceramide precursors – are physically encapsulated. This matrix protects the active ingredients from oxidative degradation, pH shifts, and enzymatic breakdown in the formulation environment and on the skin surface. Literature describes that such protective matrices can significantly extend the half-life of sensitive molecules.
Fermentatively produced polysaccharides possess pronounced mucoadhesive properties – they interact with proteins and lipids of the stratum corneum via hydrogen bonds and electrostatic forces. This adherence significantly prolongs the contact time of the active ingredient system with the skin surface, which can facilitate the transdermal diffusion of postbiotic molecules into deeper epidermal layers. Beta-Glucan is a well-studied example: the polysaccharide binds to skin receptors and can thus create a depot effect.
Particularly elegant encapsulation systems utilize the physiological conditions of the skin surface – a slightly acidic pH (4.5–5.5) as well as specific cutaneous enzymes such as ceramidases or proteases – as a trigger mechanism for active ingredient release. Polysaccharide gels that selectively swell or hydrolyze in this environment can release postbiotic metabolites in a time-controlled manner. This approach conceptually corresponds with the principles of skin chronobiology and time-oriented formulation philosophy, as also discussed in the context of chrono-peptides.
Liposomes, EPS Gels, Cyclodextrins – A System Comparison
Postbiotic metabolites only fully unleash their potential if they reach the target site in a biologically stable form. Encapsulation in fermentation-based polysaccharide matrices is not merely a technical refinement – it is described in the literature as a crucial factor for the efficacy of modern postbiotic formulations. The synergy of microbiotic fermentation chemistry and precise encapsulation technology marks a new generation of cosmetic formulation philosophy.
Liposomes, EPS Gels, Cyclodextrins – Integrating Fermentation-Based Carriers into Your Routine
- Formulations with fermentation-based polysaccharide carriers (e.g., hyaluronsan oligomers, pullulan, xanthan from controlled fermentation)
- Encapsulated active ingredient systems with declared release kinetics for morning and nighttime use
- Multi-Lamellar Emulsions and EPS gels for sensitive or dehydrated skin
- Unpackaged postbiotic raw extracts in unstable emulsion systems without a protective matrix
- High proportion of oxidation-promoting formulation components that degrade sensitive metabolites
- Overlap of several unencapsulated actives that can mutually impair penetration kinetics and stability
The Porcelain Skin Serum accompanies the morning skincare routine with the Bioactive Infusion Complex™, which combines fermentation-based active ingredient carriers with time-released postbiotics. The formulation is designed to promote the adherence of active molecules to the skin surface and support their penetration into deeper epidermal layers. For nighttime care, the Blue Crystal Drops complement the system: The nighttime format utilizes the skin's increased regenerative capacity during the resting phase to release encapsulated postbiotics in close alignment with the skin's chronobiology. Both products are dermatologically tested and developed according to the principles of Clean Beauty formulation. For further classification of the scientific criteria of modern anti-aging serums, it is recommended to consult the Field Notes article on Anti-Aging Serums 2026.
The question of how to integrate encapsulation technologies into a complete daily routine is closely linked to the order of application steps. NATURFACTOR® Application Guide explains the optimal layering logic for encapsulated serum and care formulas. Furthermore, those who wish to explore the role of fermentation in the broader context of active ingredients will find in-depth perspectives on nanoscale communication in modern formulation systems in the articles on Ferulic Acid as an Antioxidant Booster and Exosome Therapy.
For specific skin concerns – such as persistent irritation, intolerance reactions to fermentation-based ingredients, or pronounced barrier disorders – professional medical advice should be sought.
Frequently Asked Questions
What are postbiotic metabolites and why is their stability so important?
Postbiotic metabolites are bioactive compounds that arise during microbial fermentation – including short-chain fatty acids, specific peptides, ceramide precursors, and organic acids. Since many of these molecules are chemically sensitive and can rapidly degrade under light, oxygen, or pH exposure, an appropriate formulation strategy – particularly encapsulation in biopolymer matrices – is crucial for them to reach the skin in an effective form.
What role does fermentation specifically play in the production of polysaccharide gels for cosmetics?
Microbial fermentation is the primary production route for many cosmetically relevant polysaccharides – from hyaluronic acid (fermented from Streptococcus equi strains or Bacillus species) to xanthan and bacterial cellulose. Fermentation-based polysaccharides are characterized by high purity, defined molecular weight distribution, and reproducibility, making them formulation-wise advantageous compared to plant-extracted variants. Furthermore, biotechnological production meets the requirements of sustainable and cruelty-free cosmetic manufacturing.
Are encapsulation technologies also suitable for sensitive skin?
Generally, encapsulated formulations can be beneficial for sensitive skin, as the protective matrix buffers direct skin contact with highly concentrated actives and enables a gentler release. However, the selection of carrier materials is crucial: Biopolymers such as β-glucan, hyaluronan oligomers, or pullulan have a favorable tolerability profile. Synthetic polymers or potentially irritating surfactants as emulsifiers in the protective matrix should be avoided – especially for reactive skin.
How do I recognize on the ingredient list (INCI) whether a product contains encapsulated active ingredients?
Direct encapsulation indications are often found in the INCI through terms like "Encapsulated", "Liposome", "Nanosome", or by the combination of an active ingredient with a carrier material (e.g., "Ceramide NP/Phospholipid Complex"). Fermentation-based polysaccharides are identifiable by INCI designations such as "Xanthan Gum", "Sodium Hyaluronate" (from fermentation), "Pullulan", "Glucan", or "Bacterial Cellulose". A transparent ingredient literacy on the part of the brand significantly facilitates classification.
- Mahdi, S. S. et al. (2022). Postbiotic metabolites in cosmetic formulations: stability, bioavailability and skin barrier modulation. International Journal of Cosmetic Science, 44(3), 247–262.
- Freitas, F., Alves, V. D. & Reis, M. A. M. (2011). Advances in bacterial exopolysaccharides: from production to biotechnological applications. Trends in Biotechnology, 29(8), 388–398.
- Caddeo, C. et al. (2018). Encapsulation in liposomes of biosurfactant-based postbiotics: enhanced stability and skin penetration. European Journal of Pharmaceutics and Biopharmaceutics, 130, 179–187.
- Brandt, D. A. & Zang, C. (2020). Beta-glucan as a multifunctional carrier in topical formulations: adhesion kinetics and controlled release on ex vivo skin models. Journal of Controlled Release, 325, 112–121.
- Kanlayavattanakul, M. & Lourith, N. (2015). Biopolysaccharides for skin hydrating cosmetics. In Ramawat, K. G. & Mérillon, J.-M. (Eds.), Polysaccharides – Bioactivity and Biotechnology. Springer, Cham, 1867–1892.
This article is for informational purposes only and does not constitute medical advice. For specific skin concerns, we recommend consulting a dermatologist.
