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Moumoujus

POLYGONUM TINCTORIUM FLOWER EXTRACT.

Valuable / SKIN CONDITIONING, SKIN PROTECTING

Polygonum Tinctorium Flower Extract, derived from the Japanese Indigo plant, is a botanical powerhouse known for its profound antimelanogenic properties. This extract effectively brightens skin tone by targeting melanin production while also offering antioxidant and anti-inflammatory benefits, making it a versatile addition to precision skincare formulations.

Summary

Skin conditioning Antimelanogenic Antioxidant Anti-inflammatory

Science

Mechanism of Action

This extract, particularly in its fermented form, exerts significant antimelanogenic effects by reducing melanin content and inhibiting tyrosinase activity. Its action involves decreasing the expression of microphthalmia-associated transcription factor (MITF), which in turn lowers the expression of tyrosinase and tyrosinase-related protein 2. Furthermore, it modulates melanogenesis through the upregulation of extracellular signal-regulated kinase (ERK) and protein kinase B (AKT) phosphorylation. Beyond pigmentation, the broader plant extract is recognized for its antioxidant, detoxifying, and anti-inflammatory characteristics.

Research

Clinical Evidence

Medium confidence
Effective range 62.5–250%
Optimal

N/A

Key findings

  1. 01 In vitro studies using mouse melanoma cells (B16F10) demonstrated that Polygonum tinctorium fermented flower extract, at concentrations ranging from 62.5 to 250 μg/mL, significantly reduced both melanin content and tyrosinase activity without exhibiting cytotoxicity.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

The indigo pigment derived from Polygonum tinctorium requires a reduced, soluble (greenish-yellow) state to effectively bind to materials before oxidizing back to its characteristic blue, insoluble form. This suggests that careful consideration is necessary to maintain color stability if the blue pigment itself is a desired characteristic of the formulation. Specific optimal pH ranges for the active compounds of the flower extract are currently unknown.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

While not formally reviewed by CIR or SCCS, ethyl acetate-soluble components from the indigo plant are generally considered safe for use in cosmetics and pharmaceuticals with minimal side effects. SkinSAFE categorizes similar extracts (Leaf/Stem) as 'SkinSAFE 100 Free' and 'Irritant Free,' suggesting a very high safety profile. The fermented flower extract itself has been proven non-cytotoxic in mouse melanoma cell studies.

Your Skin

Skin Compatibility

Yes Normal
No Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Polygonum Tinctorium Flower Extract is a valuable ingredient for addressing hyperpigmentation and promoting a more even skin tone, backed by in vitro efficacy and a favorable safety profile.

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