Demonstration of Carbonyl Stress on Hair Follicles

Inclusion Criteria:

Criteria related to the Population :

• Women aged from 18 to 40 ans (included)
• Phototype I à IV included, according to Fitzpatrick Classification
• Hair length 5 cm on the sampling area (centro-parietal part)
• Last shampoo at least 2 days before the inclusion visit, without application of styling product, care or water between this last shampoo and the inclusion
• Informed consent signature

Criteria related to the studied condition:

• ET group: hair loss related to various etiologies evaluated by a questionnaire according to the investigator's opinion and positive pull test (at least 3 hair collected per lock of 50 to 60 hair) AND
• Control group : no hair loss, evaluated by the questionnaire and negative pull test (less than 3 hair collected per lock of 50 to 60 hair)

Exclusion Criteria:

Criteria related to Population :

• Menopause
• Pregnancy, breastfeeding, childbirth for less than 6 months

Criteria related to Pathology :

For both groups:

• Alopecia causing hair loss on the upper part of the scalp
• Dermatological pathology or evolving cutaneous lesion in the scalp
• Control group only:
• Chronic unstabilized condition
• Acute evolving pathology

Criteria related to theTreatments :

For both groups:

• Use for at least 1 month of Minoxidil, Aminexil in the 3 months before inclusion or ongoing
• Systemic treatment affecting hair growth
• Any treatment or dietary supplement for antioxidant or capillary

Control group only:

• Treatment of general thyroid disorders initiated or modified for less than 3 months prior to inclusion
• Treatment of anemia if started less than 3 months before inclusion
• General treatment initiated or modified for less than 3 months prior to inclusion in the study