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Moumoujus

OCIMUM BASILICUM HERB OIL.

Questionable CAS 84775-71-3 / PERFUMING

Ocimum Basilicum Herb Oil, derived from sweet basil, is a potent botanical extract recognized for its multi-functional benefits in skincare. It offers anti-inflammatory, antimicrobial, and antioxidant properties, targeting various skin concerns from acne to premature aging. Its efficacy is concentration-dependent, requiring precise formulation to ensure both safety and therapeutic effect.

Summary

Anti-inflammatory Antimicrobial Antioxidant Astringent Perfuming Soothing

Science

Mechanism of Action

This herb oil supports skin health through a spectrum of actions. It modulates inflammatory pathways (NF-κB, MAPK, COX-LOX) to reduce redness, swelling, and irritation associated with conditions like acne and eczema. Its potent antimicrobial, antibacterial, and antifungal compounds disrupt microbial cell membranes and inhibit biofilm formation, effectively combating acne-causing bacteria (P. acnes). As an antioxidant, it neutralizes free radicals, mitigating oxidative stress and contributing to anti-aging by boosting cellular metabolism. Furthermore, its astringent nature helps to purify pores, manage excess sebum, and refine skin texture, while also supporting overall skin healing and, when appropriately formulated, moisture retention.

Research

Clinical Evidence

Medium confidence
Effective range 2–3%
Optimal

2%

Key findings

  1. 01 A 3% Ocimum basilicum microemulsion demonstrated safety and tolerability on human skin, inducing no clinically observable irritations in a 3-day cumulative irritancy study.
  2. 02 Products containing Ocimum essential oils at a 2% concentration were previously established as safe concerning skin irritation.

Transparency

Dusting Analysis

Commonly dusted
Min. effective
2%
Red flag below
5%

While Ocimum Basilicum Herb Oil exhibits clinical benefits at concentrations between 2% and 3%, its potent aromatic profile often leads to its inclusion as a fragrance agent at much lower levels (e.g., IFRA recommends up to 0.5% in fragrance concentrates, typical facial dilution is 1-2%). If used below its proven effective concentration range for active benefits, it functions primarily as a 'dusted' ingredient, where its functional claims may not be substantiated by its presence. Concentrations at or above 5% have been shown to irritate human skin, establishing a clear upper safety limit for topical application.

The Formula

Formulation

Solubility
Oil
Optimal pH 5.5 – 6.5
0 7 14

Stability

For optimal stability, particularly in linalool-rich sweet basil oil, the addition of antioxidants such as 0.1% BHT or alpha-tocopherol is recommended during raw material processing, ensuring peroxide levels remain below 20 mmol/l in final products. The oil is generally non-discoloring and requires storage in a cool, dark, and dry environment for extended shelf-life.

Synergies

  • Antioxidants (e.g., BHT, alpha-tocopherol) for enhanced stability and prevention of peroxide formation.
  • Carrier oils for dilution and safe topical application.

Conflicts

  • Direct application of concentrated oil ('neat') due to high risk of irritation, sensitization, or chemical burns.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
4.9%
Sensitization risk High

Although generally recognized as safe (GRAS) by the FDA for food use, Ocimum Basilicum Herb Oil, particularly the 'sweet basil' chemotype, requires strict dilution for topical application to prevent skin irritation, sensitization, or chemical burns; a patch test is highly advised. The 'sweet basil' variant is preferred over 'exotic basil' due to its higher d-linalool content and significantly lower levels of estragole (methyl chavicol), a potential carcinogen. However, EWG Skin Deep rates Ocimum Basilicum (Sweet Basil) Oil with 'MODERATE' concern for cancer and 'HIGH' concern for allergies & immunotoxicity.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

While offering diverse and clinically supported skin benefits at 2-3% concentration, the notable concerns regarding potential carcinogenicity (moderate) and high allergy/immunotoxicity (EWG), coupled with a low irritation threshold at 5%, necessitate extremely cautious formulation and thorough risk assessment.

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