The filtrate derived from rice fermented with Saccharomyces yeast serves as a potent nutrient delivery system, providing high concentrations of amino acids, vitamins, and minerals. This bio-available liquid enhances the skin barrier while simultaneously improving texture and luminosity through natural enzymatic processes.
- INCI Name:
- Saccharomyces/Rice Ferment Filtrate
- Chemical/Scientific Name:
- Filtrate of the product obtained by the fermentation of Oryza sativa by the microorganism Saccharomyces
- Common Aliases:
- Fermented Rice Water, Sake Filtrate
| Category: | Active Substances |
| Source Origin: | Biotechnology (Plant-derived substrate) |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Dermatology, Personal Care |
| Solubility: | Water-soluble |
At a Glance: Properties & Effects
| Hydration/Moisture: | |
| Brightening/Tone: | |
| Barrier Repair: | |
| Irritation Risk: |
Primary Benefits:
- Deeply hydrates the stratum corneum through a rich profile of Amino Acids.
- Suppresses oxidative stress via natural antioxidant compounds like Ferulic Acid.
- Promotes a more even skin tone by inhibiting tyrosinase activity.
- Softens skin texture and reduces the appearance of fine lines through cellular nourishment.
Potential Risks:
- Generally well-tolerated with minimal risk of sensitization.
- Occasional sensitivities may occur in individuals with specific yeast allergies.
Biological Action & Cosmetic Profile
Microbial conversion transforms the molecular structure of rice proteins and starches into smaller, more bio-available fractions. During the fermentation process, Saccharomyces yeast secretes enzymes that break down the substrate into a complex mixture of metabolites. These include saccharides, Amino Acids, and organic acids such as Lactic Acid. By reducing the molecular size of these nutrients, the filtrate can penetrate the upper layers of the skin more effectively than non-fermented rice extracts.Nutrient density within the filtrate supports the skin’s Natural Moisturizing Factor (NMF). The presence of B-complex vitamins and minerals aids in cellular energy metabolism and DNA repair. Furthermore, clinical observations suggest that fermented rice water increases the production of procollagen in dermal fibroblasts, which contributes to improved elasticity and structural integrity.Skin brightening occurs through several pathways. The filtrate contains trace amounts of kojic acid and other polyphenols that modulate melanin production. Regular application helps to mitigate post-inflammatory hyperpigmentation and age-related dullness, resulting in a clearer and more radiant complexion.
Broader Applications & Origins
Traditional Asian beauty practices have utilized rice water for centuries, particularly in Japan and Korea, where it was historically prized for its softening and brightening properties. Modern cosmetic chemistry has refined these traditional methods using controlled fermentation tanks to ensure purity, potency, and shelf stability. This biotechnological approach allows for the concentration of specific beneficial metabolites that are often absent or diluted in homemade preparations.
Routine Integration
Synergies:
- Works excellently with Niacinamide to enhance the skin barrier and target uneven tone.
- Combines effectively with Sodium Hyaluronate or Glycerin for multi-layered hydration.
- Complements Ascorbic Acid by providing additional antioxidant support to stabilize the formula.
Conflicts:
- No known major contraindications; compatible with most active skincare ingredients.
Clinical Consensus & Safety
Dermatological assessments categorize Saccharomyces/Rice Ferment Filtrate as a low-hazard ingredient with a high safety profile. The Cosmetic Ingredient Review (CIR) and European CosIng database support its use in leave-on and rinse-off products. Because it is a postbiotic—meaning it contains the beneficial byproducts of fermentation rather than live cultures—it does not disrupt the skin’s natural microbiome. Clinical studies published in peer-reviewed journals emphasize its non-irritating nature, making it suitable for sensitive and reactive skin types.
Is this the same as “Sake” for the skin?
While Sake is a rice ferment, the cosmetic filtrate is specifically processed to remove alcohol and impurities. This ensures the skin receives the concentrated nutrients—such as minerals and peptides—without the drying effects of ethanol.
Can this ingredient help with acne?
While not a primary anti-acne active, its ability to soothe inflammation and support the skin barrier can help reduce the redness and irritation associated with breakouts. It is non-comedogenic and unlikely to clog pores.
Is it considered a probiotic?
Technically, it is a postbiotic. It is the filtered liquid containing the nutrients created during fermentation, but it does not contain live bacteria or yeast when it reaches the final product.