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LACTOBACILLUS/LAC FERMENT.

Valuable CAS - / SKIN CONDITIONING

Lactobacillus/Lac Ferment is a postbiotic ingredient derived from bacterial fermentation, delivering a complex profile of beneficial metabolites to the skin. It works to optimize the skin's intrinsic microbiome, enhance barrier function, and address diverse concerns from hyperpigmentation to sensitivity.

Summary

Probiotic DNA repair enzyme Antimicrobial Anti-inflammatory Natural preservative Skin brightening Hydrating Barrier strengthening Antioxidant Soothing Collagen stimulator

Science

Mechanism of Action

This ferment operates by introducing beneficial metabolites, including lactic acid and various peptides, to rebalance the skin's inherent microbiome. Its inherent antimicrobial properties actively create an unfavorable environment for pathogenic bacteria and fungi. Concurrently, it strengthens the skin barrier through the stimulation of ceramides and other lipid molecules, effectively minimizing transepidermal water loss and reinforcing the acid mantle. The ingredient exhibits potent soothing and anti-inflammatory effects, demonstrably reducing redness and calming sensitive skin. Furthermore, it enhances skin hydration, brightens the complexion via tyrosinase inhibition, and provides antioxidant protection against environmental stressors; peptides also contribute to potential collagen synthesis.

Research

Clinical Evidence

High confidence
Effective range 1%–5%%
Optimal

N/A

Key findings

  1. 01 Demonstrated significant anti-microbial and anti-inflammatory properties, reducing the size and redness of acne lesions faster than salicylic acid, indicating strong potential for acne and rosacea management. (Estee Lauder research, 2012)
  2. 02 Showed efficacy in reducing skin sensitivity. (Estee Lauder research, 2012)
  3. 03 Metabolites effectively inhibit tyrosinase, the enzyme responsible for melanin production, which aids in regulating melanin, reducing hyperpigmentation, and brightening skin tone. (A 2022 study)
  4. 04 Functions as a DNA repair enzyme, offering protection against environmental aggressors. (Estee Lauder patent, 2009)
  5. 05 Topical fermented extracts, including this ingredient, improve skin hydration and barrier function, leading to a reduction in transepidermal water loss. (Review in Journal Nutrients)

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

The inherent fermentation process typically lowers the ingredient's pH, rendering it more compatible with the skin's natural acidic mantle. This pH alignment enhances both its efficacy and overall skin tolerance, with its lactic acid content naturally contributing to skin pH balance.

Conflicts

  • strong exfoliants (AHAs or BHAs)
  • retinoids

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

Generally considered safe for all skin types, exhibiting non-irritating and non-sensitizing properties with a very low risk of allergic reactions. It is classified as non-toxic and non-comedogenic, and holds EcoCert and COSMOS certifications. A patch test is recommended for individuals with historically sensitive skin or known allergies.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Lactobacillus/Lac Ferment is a valuable, multi-functional postbiotic ingredient offering significant benefits across all skin types, including improved barrier health, reduced inflammation, microbiome balance, and targeted action on hyperpigmentation.

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