Targeted dry skin treatment using a multifunctional topical moisturizer

Area of Science:

• Dermatology
• Cosmetic Science
• Biophysics

Background:

• Dry skin development is multifactorial, necessitating comprehensive formulation strategies.
• Understanding the complex interplay of factors in dry skin evolution is crucial for effective treatment.

Purpose of the Study:

• To evaluate the efficacy of a novel oil-in-water moisturizer on dry leg skin over three weeks.
• To assess multiple skin parameters using traditional and advanced biophysical methods.

Main Methods:

• A 3-week in vivo study on dry lower leg skin comparing a moisturizer to an untreated site.
• Utilized Corneometer®, Epsilon®, visual grading, transepidermal water loss (TEWL) measurements.
• Employed Lipbarvis® and in vivo Confocal Raman Spectroscopy for lipid analysis.

Main Results:

• Significant improvements in skin hydration (Corneometer®, Epsilon®, visual grading) and barrier function (TEWL).
• Increased levels of cholesterol, free fatty acids, and specific ceramides (NH).
• Enhanced stratum corneum (SC) lipid lamella bilayer length and lipid-to-protein ratio.

Conclusions:

• The tested moisturizer effectively improved skin hydration and barrier function in dry skin.
• Product application positively impacted SC lipid levels, morphology, and epidermal differentiation.
• Significant reduction in dry skin characteristics observed after three weeks of product use.