Science
Mechanism of Action
Functions as a reducing agent that cleaves disulfide bonds in keratin proteins, converting them to sulfhydryl groups. On skin, it denatures proteins in the stratum corneum, disrupts intercellular lipids, and reduces corneocyte cohesion, facilitating controlled chemical exfoliation while potentially causing significant irritation.
Research
Clinical Evidence
Medium confidence10%
Key findings
- 01 10% thioglycolic acid gel demonstrated effective treatment of infraorbital hyperpigmentation with high patient satisfaction, producing only mild erythema and temporary desquamation
- 02 Safety assessment confirmed thioglycolates safe up to 15.2% in hair products, though recognized as cumulative irritants under occlusive conditions
Transparency
Dusting Analysis
Given its high irritation potential and specialized applications, concentrations above 1% warrant careful evaluation, with concentrations exceeding 5% requiring professional oversight
The Formula
Formulation
Stability
Requires high alkaline pH (11-12.5) for optimal disulfide cleavage activity. Air-sensitive and readily oxidizes to dithiodiglycolic acid upon exposure. Enhanced stability at pH below 6.0. Must be stored in airtight, dark glass containers.
Conflicts
- strong oxidizing agents
- strong acids
- strong bases
- organic halogens
- ketone groups
- iron compounds
Safety
Safety Profile
CIR approved up to 15.2% for hair products. EU SCCS restricts to 5% in depilatories and prohibits eyelash use. Recognized cumulative irritant under occlusive conditions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While clinically effective for hyperpigmentation treatment, the high irritation potential and complex formulation requirements make it unsuitable for most precision skincare applications.
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References
Sources