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Updated: Jul 3, 2026

Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface
Published on: May 1, 2020
Unexpected distribution of surface hydration level of the lip
L Caisey1, E Gubanova, D Baras
1L'Oréal Recherche, Chevilly Larue, France.
Background:
The functional properties of human lips depend on their hydration level. Limited data are, however, available.
Objective:
To investigate water distribution through the lower lip surface.
Methods:
Images from the surface of the lip were recorded using a new capacitance imaging technique. Capacitance and conductance measurements were also carried out in various points of lower lip and on adjacent skin.
Results:
Data clearly show that the closest part of the mucosa of the lip is less hydrated than the external part. These unexpected findings could be related to the presence of a premucosa area whose structure is clearly different from that of vermilion zone.
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