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Moumoujus

JUGLANS NIGRA BARK EXTRACT.

Questionable CAS 96690-56-1 / HAIR CONDITIONING

Derived from the black walnut tree, Juglans Nigra Bark Extract offers a range of properties including astringent, antimicrobial, and antioxidant effects. Its complex composition supports various skin conditioning benefits, primarily through its active compounds like juglone and tannins.

Summary

astringent antiseptic antimicrobial antifungal antioxidant skin conditioning hair conditioning

Science

Mechanism of Action

The efficacy of Juglans Nigra Bark Extract stems from its rich profile of constituents, notably juglone, alongside tannins, ellagic acid, gallic acids, and flavonoids. Juglone is a key contributor to its antiseptic, antimicrobial, and antifungal actions, particularly against dermatomycosis. The extract's astringent qualities, imparted by tannins, facilitate skin contraction and tightening. Furthermore, in vitro research suggests black walnut extracts possess antioxidant activity and a capacity to inhibit the release of proinflammatory mediators, indicating a potential anti-inflammatory effect.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Conflicts

  • The presence of juglone confers a potential for skin irritation, sensitization, and contact dermatitis, necessitating careful formulation.
  • As a natural dyeing agent, the extract can impart color to formulations, which must be considered for product aesthetics and stability.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk High

A specific safety assessment by the Cosmetic Ingredient Review (CIR) or Scientific Committee on Consumer Safety (SCCS) has not been conducted for Juglans Nigra Bark Extract. While it holds an FDA Unique Ingredient Identifier (UNII), a definitive cosmetic safety status (e.g., GRAS) is unestablished. Compounds like juglone, found in Juglans regia (English Walnut) barks, have been linked to contact dermatitis, hypersensitivity, and cytotoxicity. Walnuts (Juglans spp.) are recognized allergens, suggesting a broader potential for allergic reactions. Dermal toxicity for this specific extract is currently reported as 'Not determined'.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

While Juglans Nigra Bark Extract exhibits promising astringent, antimicrobial, and antioxidant properties, the absence of formal safety assessments, a high potential for sensitization and irritation due to juglone, and a lack of clinical efficacy data renders its use questionable for precision skincare.

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