Abstract
As new biophysical methods become available to the skin researcher, it is important to understand the type of information that they are capable of measuring, and how it relates to consumer perception of topical moisturizing products. This work was aimed at understanding how two-dimensional (2D) skin hydration mapping can be used to describe skin properties beyond the traditional ‘single number’ approach to skin hydration. Two-dimensional skin hydration measurement data were collected at baseline and after 1 week of in vivo usage of a topical moisturizing product. In addition, subject feedback regarding their skin condition obtained during the study was collected and assessed. Dividing the 2D hydration measurement device images into zones of different electrical permittivity scores enabled analysis of different aspects of the skin compared with traditional electrical skin hydration measurements. Improvement in skin flexibility as a result of use of the topical test product was demonstrated. Complete description of the skin’s hydration state through the creation of hydration histograms to describe its electrical characteristics was performed. Subject feedback data showed improvements in aspects of skin assessed using 2D hydration measurement.
Highlights
Dry, sensitive, xerotic skin is the most common dermatological disorder impacting up to around 50% of the world’s population [1,2]
Within the image is a red circle which outlines a user-defined region of interest (ROI) which can be analyzed if needed
On the right-hand side of the image is a histogram showing the distribution of permittivity values of the entire measurement area in green and from within the ROI in red, expressed as a percentage of the measurement area
Summary
Sensitive, xerotic skin is the most common dermatological disorder impacting up to around 50% of the world’s population [1,2]. Over the last 35 years, there has been a rapid expansion in the number and type of noninvasive biophysical methods capable of measuring a wide variety of skin parameters [4,5]. The use of these techniques has become an integral part of research into topical skin products and clinical testing for both the consumer and pharmaceutical markets. Along with the development of new methodologies, there comes a need to understand what aspects of the skin they can assess, the relevance of new information they provide, and how the data they provide relate to actual consumer feedback about topical product usage
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