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CINNAMOMUM CASSIA BARK.

Questionable CAS 84961-46-6 / SKIN CONDITIONING

Cinnamomum Cassia Bark extract offers multifaceted benefits, from potent antioxidant and anti-inflammatory action to sebum regulation. It is recognized for its capacity to enhance skin elasticity and moisture, thereby targeting visible signs of aging.

Antioxidant Antimicrobial / Antibacterial Anti-inflammatory Skin Conditioning Sebum Regulator Masking Perfuming

Science

This extract functions as a powerful antioxidant, shielding skin from free radical damage and mitigating wrinkle formation. It exerts antimicrobial and antibacterial effects against fungal and acne-causing bacteria. Its anti-inflammatory properties soothe irritation, reduce nitric oxide production, and may alleviate symptoms associated with atopic dermatitis by suppressing T-helper 2 cell responses. Furthermore, it aids in regulating sebum, offers pore-cleansing, supports microcirculation, and inhibits elastase and hyaluronidase to improve skin elasticity and hydration.


Research

High confidence
Effective range 0.0001–10%
Optimal

0.001%

Key findings

  1. 01 Inhibition of elastase activity was observed with concentrations between 100-1000 µg/mL of methanolic extract and in cosmetic compositions at 0.0001-10%, with optimal effects noted in the 0.001-5% range, contributing to improved skin elasticity and moisturization.
  2. 02 Cinnamaldehyde, a key component, demonstrated dose-dependent inhibition of nitric oxide production, reaching 81.5% inhibition at 1.0 µg/µL.
  3. 03 Significant anti-inflammatory activity was identified at 400 µg/mL.
  4. 04 Dose-dependent effects were shown in reducing atopic dermatitis-like skin lesions in mice and suppressing chemokine production in human keratinocytes.

Transparency

Commonly dusted
Min. effective
0.0001%
Red flag below
5%

Due to its distinctive scent and known allergenic compounds like cinnamaldehyde and eugenol, Cinnamomum Cassia Bark is frequently included for masking or perfuming rather than its primary skincare benefits. Concentrations exceeding the optimal efficacy range (e.g., above 5%) or those used primarily for fragrance without substantial primary benefits, significantly elevate the risk of irritation and sensitization, representing a 'dusting' scenario where risks outweigh rewards.


The Formula

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Cosmetic formulations containing Cinnamomum Cassia extract demonstrated stability for one month at 45°C. Extraction can be achieved using a variety of solvents including water, lower alcohols, acetone, ethyl acetate, butanol, hexane, benzene, chloroform, and polyhydric alcohols like glycerin.

Conflicts

  • High concentrations may induce skin sensitivities, rashes, and irritation.
  • Contains volatile fragrance compounds (cinnamaldehyde, eugenol) that are known allergens.
  • Requires patch testing for individuals with sensitive skin to mitigate contact dermatitis risk.

Safety

CIR Status
Not reviewed
Max tested
10%
Sensitization risk High

While Cinnamomum cassia essential oil is GRAS for flavoring, its extract poses a high risk for skin sensitivity, irritation, redness, itching, and contact dermatitis, particularly for sensitive individuals or those with cinnamon allergies. Its volatile components, cinnamaldehyde and eugenol, are established allergens. Regulatory bodies advocate for strict concentration monitoring. EWG assigns a 'HIGH' concern for 'Allergies & Immunotoxicity', and IFRA identifies 'Dermal sensitization and systemic toxicity' as critical effects for its components.


Your Skin

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

Our Assessment

Questionable

Despite its promising antioxidant, anti-inflammatory, and sebum-regulating properties, the high risk of irritation and sensitization from Cinnamomum Cassia Bark renders its use questionable for precision skincare, demanding extremely cautious formulation and diligent patch testing.


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