Science
Mechanism of Action
Climbazole exerts its antifungal effects by selectively inhibiting the fungal enzyme 14α-demethylase. This enzyme plays a crucial role in the biosynthesis of ergosterol, an essential sterol found in fungal cell membranes. By disrupting ergosterol synthesis, climbazole compromises the structural integrity and permeability of the fungal cell membrane, thereby impeding the growth and replication of fungi, especially Malassezia species.
Research
Clinical Evidence
High confidence1% to 2% in rinse-off products, with enhanced activity at pH 4.0-5.5.
Key findings
- 01 A 0.65% climbazole shampoo was shown to significantly reduce dandruff, skin redness, and itching in 80% of volunteers suffering from moderate to severe seborrheic dermatitis over a 4-week treatment period.
- 02 A 1% climbazole shampoo formulated at pH 4 demonstrated significantly superior efficacy in reducing dandruff compared to an identical concentration at pH 7.
- 03 Clinical data indicates a 2% climbazole shampoo at pH 5.5 was more effective at reducing dandruff than a standard 1% climbazole shampoo at pH 7.0.
- 04 Laboratory tests reveal a Minimum Inhibitory Concentration (MIC) of approximately 0.06 μg/mL (0.000006%) against Malassezia, highlighting its potent antifungal activity even at very low doses.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Climbazole exhibits excellent stability across acidic and neutral pH ranges (3-8). It is photostable and chemically stable in both aqueous and oil-based systems, showing good stability to light and heat (avoiding temperatures above 70°C). It is not hygroscopic and does not form colored complexes with metal ions, thus preventing discoloration in formulations. While insoluble in water, it readily dissolves in alcohol, glycols, surfactants, and perfume oils.
Synergies
- Activity and adherence to the skin are enhanced in acidic pH environments, specifically between pH 4.0 and 5.5.
Safety
Safety Profile
The SCCS (Scientific Committee on Consumer Safety) considers climbazole safe for use as an anti-dandruff agent in rinse-off shampoos up to 2%. For leave-on applications (face cream, hair lotion, foot care), it is deemed safe as a cosmetic preservative up to 0.2%. It is generally considered non-sensitizing and has a low toxicity profile at lower concentrations. However, combinations of multiple leave-on products may lead to cumulative exposure concerns. Mild localized irritation, such as redness or itching, may occur in cases of overexposure or on very sensitive skin types.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Climbazole is a valuable and highly effective antifungal ingredient, particularly adept at addressing Malassezia-related skin and scalp conditions, offering significant clinical benefits in reducing dandruff, redness, and itching.
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