Science
Mechanism of Action
BHT functions as a primary antioxidant by neutralizing free radicals through the donation of a hydrogen atom to peroxy radicals. This action halts the autoxidation chain reaction, effectively shielding lipid-based components from becoming rancid or losing their structural stability.
Research
Clinical Evidence
High confidence0.8%
Key findings
- 01 Clinical evaluations demonstrate that while pure BHT is a mild irritant, use levels between 1.0% and 2.0% show a low risk of sensitization even in patients with pre-existing dermatitis.
- 02 Stability research indicates that concentrations as low as 0.05% are sufficient to preserve the physical and pigment stability of complex cream-based formulations.
Transparency
Dusting Analysis
Because BHT is a functional stabilizer rather than an active skin-treatment ingredient, it is rarely 'dusted' for marketing purposes. It is typically used at the minimum effective dose (often <0.1%) to maintain formula stability without increasing sensitization risk.
The Formula
Formulation
Stability
BHT is highly heat-stable (up to 70°C) during processing but sensitive to UV light. It degrades in highly alkaline environments where pH exceeds 9.0.
Synergies
- Vitamin E (Tocopherol)
- Unsaturated Vegetable Oils
- Sensitive Natural Pigments
Conflicts
- Oxidizing agents
- Strong bases
- Brass
- Copper alloys
- Steel
Safety
Safety Profile
Recognized as GRAS (Generally Recognized As Safe) by the FDA. SCCS and CIR confirm safety in cosmetics up to 0.8%, though oral care limits are significantly lower (0.001% for mouthwash).
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential stabilizer for lipid-heavy formulas that ensures product longevity and ingredient integrity with a low risk profile at recommended concentrations.
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