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GPSkin® Barrier Device for Rosacea


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Stratum corneum hydration (SCH) is a measurement useful for assesing the outermost layer of the epidermis. 

"Transepidermal water loss (TEWL or TWL) is the loss of water that passes from inside a body (animal or plant) through the epidermis (that is, either the epidermal layer of animal skin or the epidermal layer of plants) to the surrounding atmosphere via diffusion and evaporation processes." Wikipedia

A paper concluded that the GPSkin® Barrier device "determines TEWL and SCH accurately in healthy and impaired skin barrier state and can monitor skin barrier function in rosacea during treatment. The GPSkin device is much more practical compared to previous skin barrier tools when used in clinical practice.' [1]

"Based on these findings, we concluded that GPSkin provides reasonably precise and reliable measurements of SC hydration and TEWL as compared to current devices." [2]

"GPSkin Barrier® is a reliable, affordable, and versatile device for assessing epidermal permeability barrier function and SC hydration."[3]

"Transepidermal water loss (TEWL) is the amount of water that passively evaporates through skin to the external environment due to water vapor pressure gradient on both sides of the skin barrier and is used to characterize skin barrier function." [4]

"Now, over half of world’s top 10 skincare brands have already adopted the gpskin Barrier (www.gpower.kr) as a skin diagnostic device." [5]

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More information on diagnosing rosacea

End Notes

[1] Skin Res Technol. 2020 Jun 23;:
Value of GPSkin for the measurement of skin barrier impairment and for monitoring of rosacea treatment in daily practice.
Logger JGM, Driessen RJB, de Jong EMGJ, van Erp PEJ

[2] Skin Res Technol. 2019 Sep;25(5):612-617.  doi: 10.1111/srt.12692.  Epub 2019 Apr 3.
Validation of a Novel Smartphone Application-Enabled, Patient-Operated Skin Barrier Device
Erin E Grinich , Anuja V Shah, Eric L Simpson 

[3] Skin Res Technol. 2019 Jan;25(1):25-29.  doi: 10.1111/srt.12590. Epub 2018 Jun 4.
Validation of GPSkin Barrier ® for Assessing Epidermal Permeability Barrier Function and Stratum Corneum Hydration in Humans
L Y , Z Wang, Z Li, C Lv, M-Q Man 

[4] Science Direct
Transepidermal Water Loss, Skin Structure and Function
Golara Honari, Howard Maibach, in Applied Dermatotoxicology, 2014

[5] Dematology.com


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