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Moumoujus

CYMBOPOGON NARDUS OIL.

Valuable CAS 8000-29-1 / 89998-15-2 / FRAGRANCE, TONIC

Cymbopogon nardus oil, commonly known as Citronella oil, is a multifaceted essential oil recognized for its antimicrobial, anti-inflammatory, and antioxidant properties. It functions as a natural astringent and cleanser, contributing to a refined skin appearance. However, precise formulation is critical due to its potential for skin irritation and sensitization.

Summary

perfuming masking tonic antioxidant antimicrobial anti-inflammatory astringent insect repellent cleanser detoxifier

Science

Mechanism of Action

Cymbopogon nardus oil primarily exerts its antimicrobial and antifungal effects by compromising the cell membrane integrity of pathogens, driven by active constituents such as citronellal, citronellol, and geraniol. Beyond pathogen control, its antioxidant capacity shields the skin from free radical damage and mitigates oxidative stress, offering anti-aging benefits. The oil also contains anti-inflammatory compounds that reduce redness and swelling, while its astringent nature helps to tighten skin, regulate sebum production, and minimize pore congestion. Furthermore, it aids in skin purification by assisting in the breakdown and removal of surface impurities.

Research

Clinical Evidence

Medium confidence
Effective range 0.0000244%–15%%
Optimal

1-2.5%

Key findings

  1. 01 Demonstrated minimum inhibitory concentrations (MICs) against various bacterial isolates from aquatic animals and ATCC type strains.
  2. 02 Exhibited a minimum inhibitory concentration (MIC) of 0.5 mg/mL against Candida albicans.
  3. 03 Inhibited 80% of Aspergillus niger growth at 400 mg/L.
  4. 04 Showed low cytotoxic activity on Vero and NIH-3T3 cells, with an IC50 > 100 µg/mL.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.0000244%
Red flag below
2.5%

Cymbopogon nardus oil exhibits significant antimicrobial efficacy at exceptionally low concentrations, with minimum inhibitory concentrations (MICs) reported from 0.0000244%. This indicates that even trace amounts can exert a genuine biological effect, suggesting it is not commonly 'dusted' when formulated for specific antimicrobial claims. For general topical application and broader skincare benefits, a dilution range of 1-2.5% for normal skin is recommended. Exceeding a 2.5% concentration for leave-on products is considered a red flag, as it significantly increases the risk of skin irritation and sensitization.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Essential oils, including Cymbopogon nardus oil, are susceptible to light degradation; therefore, storage in dark-colored, airtight bottles is recommended to maintain stability and efficacy.

Conflicts

  • Direct, undiluted application to skin or hair is contraindicated due to its high potential for irritation and blistering.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
2.5%%
Sensitization risk Moderate

Cymbopogon nardus oil is categorized as an irritant to skin and eyes, and a dermal sensitizer by EFSA. Topical application, particularly in high concentrations or in an undiluted form, may elicit adverse skin reactions including redness, blotchiness, itchiness, or swelling. Inhalation of high vapor concentrations can also cause irritation to the throat and respiratory system. Recommended topical dilutions are 0.5-1% for sensitive skin and 1-2.5% for normal skin.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Cymbopogon nardus oil is a valuable multi-functional ingredient for precision skincare, offering significant antimicrobial, antioxidant, and anti-inflammatory benefits when formulated at carefully controlled, diluted concentrations to mitigate its inherent dermal irritation and sensitization risks.

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