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pH measurements during lactic acid stinging test in normal and sensitive skin
N Issachar1, Y Gall, M T Borell
1Département de Dermopharmacie et Biophysique Cutanée, Faculté de Pharmacie, Paris, France.
Contact Dermatitis
|March 1, 1997
Summary
Sensitive skin lacks objective signs, making it difficult to diagnose. Measuring skin pH changes after lactic acid application offers a reliable method for identifying sensitive skin populations.
Area of Science:
- Dermatology
- Cosmetic Science
- Skin Physiology
Background:
- Sensitive skin is characterized by subjective symptoms like stinging and burning.
- Objective diagnostic methods for sensitive skin are currently lacking.
- Understanding skin physiology is key to identifying sensitive skin markers.
Purpose of the Study:
- To propose and validate a new objective test for identifying sensitive skin.
- To investigate the utility of skin pH variation measurement in sensitive skin detection.
- To differentiate sensitive skin populations from control groups using a standardized test.
Main Methods:
- Recruitment of a preselected sensitive skin population and a control group.
- Application of lactic acid to the nasolabial fold and forearm.
- Measurement of skin pH variations at specific time points post-application.
Main Results:
- Significant differences in skin pH variations were observed between sensitive and control groups.
- Lactic acid challenge demonstrated a measurable and distinct response in sensitive skin.
- The proposed test proved effective in documenting sensitive skin characteristics.
Conclusions:
- Skin pH variation measurement after lactic acid application is a viable objective test for sensitive skin.
- This method can aid in the reliable detection and documentation of sensitive skin populations.
- Further research can refine this technique for clinical and cosmetic applications.