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LACTOBACILLUS/WHEY FERMENT.

Valuable CAS - / SKIN CONDITIONING

Lactobacillus/Whey Ferment is a probiotic-derived ingredient resulting from the fermentation of whey by Lactobacillus bacteria. This advanced complex delivers a multifaceted approach to skin health, targeting hydration, barrier support, and microbiome balance. Its precision-engineered metabolites contribute to a visibly calmer, brighter, and more resilient complexion.

Soothing Skin Conditioning Hydrating Brightening Anti-inflammatory Antioxidant Microbiome Balancing Barrier Strengthening Exfoliating (mild) Preservative (potential ancillary function)

Science

This ferment profoundly benefits skin health through multiple pathways. It significantly enhances hydration by delivering humectant-rich amino acids and polysaccharides, consequently reducing transepidermal water loss (TEWL). Skin brightening is achieved via tyrosinase inhibition, which effectively mitigates hyperpigmentation. The ingredient fosters a balanced skin microbiome by introducing beneficial metabolites, including lactic acid and peptides, which are crucial for addressing concerns such as acne, sensitivity, and dryness. It fortifies the skin barrier by stimulating the production of ceramides and essential lipid molecules. Furthermore, its anti-inflammatory properties soothe irritation and redness by modulating immune responses and decreasing inflammatory cytokines. Antioxidants like ferulic acid and polyphenols protect against oxidative stress. Organic acids and galacto-oligosaccharides, including butyric acid, actively suppress inflammation, regulate the immune system, support keratinocyte differentiation, and provide skin-lightening effects. Lactic acid specifically offers gentle exfoliation, diminishes dark spots, improves the appearance of wrinkles, and acts as a natural moisturizing factor.


Research

Medium confidence
Effective range 1–5%
Optimal

N/A


Transparency

Not commonly dusted

Information regarding 'dusting' or common over-formulation practices for Lactobacillus/Whey Ferment is not available in the provided data.


The Formula

Solubility
Water
Optimal pH 3 – 8
0 7 14

Stability

For optimal stability, this ingredient should be incorporated into formulations during the cooling phase, at temperatures below 70°C (158°F), and ideally before the addition of any thickening agents. While the fermentation process itself may yield a pH around 4.73, the final formulation can effectively maintain stability within a broader pH range of 3.0 to 8.0.


Safety

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel has deemed 'Lactobacillus Ferment' and related derivatives safe for use in cosmetics. While the CIR report notes that the inclusion of an 'atypical substrate' like whey in the INCI name might imply distinct considerations, a specific whey-based fermented product (using Lactobacillus delbrueckii) has been rigorously tested, showing no cytotoxic reactivity and no irritating properties in patch tests on sensitive skin, reinforcing its safety profile.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

Lactobacillus/Whey Ferment is a valuable, multi-functional ingredient that leverages probiotic science to deliver significant benefits across all skin types, including enhanced hydration, barrier support, brightening, and a balanced microbiome, all with a low risk of irritation.


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