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BACILLUS/PRUNUS YEDOENSIS LEAF EXTRACT FERMENT FILTRATE.

Valuable / HUMECTANT, SKIN CONDITIONING, SKIN PROTECTING

A high-performance biotechnological active produced by fermenting Yoshino Cherry leaves with Bacillus bacteria to unlock potent bioavailable polyphenols. This precision ingredient is engineered to enhance skin transparency while simultaneously reinforcing the structural integrity of the moisture barrier.

Humectant Skin conditioning Skin protecting Brightening Anti-inflammatory

Science

Through fermentation, complex glycosides are converted into smaller, more active metabolites like Prunetin and Sakuranetin. These compounds work on a cellular level to inhibit the NF-κB signaling pathway, reducing pro-inflammatory cytokines (IL-6 and TNF-α), while suppressing tyrosinase activity to modulate melanin production. Additionally, it upregulates the synthesis of filaggrin and involucrin, essential proteins for a resilient skin barrier.


Research

Medium confidence
Effective range 1–3%
Optimal

2%

Key findings

  1. 01 In vitro testing confirmed significant inhibition of tyrosinase and a marked decrease in inflammatory markers compared to standard Sakura extracts.
  2. 02 A 4-week clinical study at 2.0% concentration resulted in a 15% measurable increase in skin transparency and a visible reduction in surface roughness.

Transparency

Commonly dusted
Min. effective
1%
Red flag below
0.5%

Due to the prestige associated with Japanese Sakura, this ingredient is frequently 'dusted' at concentrations below 0.5% for marketing claims. Efficacy in skin clarity and barrier protein stimulation requires a minimum threshold of 1.0%.


The Formula

Solubility
Water
Optimal pH 4.5 – 6.5
0 7 14

Stability

Thermolabile; must be incorporated during the cooling phase of production (below 40°C) to maintain the integrity of its fermented metabolites.

Synergies

  • Niacinamide
  • Glucosamine
  • Hyaluronic Acid

Conflicts

  • Strong oxidizing agents
  • Formulations with pH above 8.0

Safety

CIR Status
Not reviewed
Sensitization risk Low

While specifically a newer ferment, the parent Yoshino Cherry leaf has an established history of safety in cosmetics. It is categorized as non-toxic and suitable for sensitive skin profiles.


Your Skin

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

Our Assessment

Valuable

An exceptional multi-pathway active that successfully combines anti-inflammatory soothing with measurable brightening and barrier-strengthening benefits.


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