Biometrology Guidelines for the In Vivo Assessment of Transepidermal Water Loss and Skin Hydration in Nonclinical Settings

Abstract The purpose of this study was to evaluate transepidermal water loss, skin hydration and skin pH in normal ponies. Sixteen ponies of both sexes were examined in the study. Measurements were taken from seven different sites: the neck region, the shoulder, thorax, lumbar, inguinal, lip region and the auricle. In each of the regions transepidermal water loss (TEWL), skin hydration and skin pH were measured. For transepidermal water loss, the lowest values were observed in the lumbar region (9.71g/hm2), while the highest values were observed in the lip region (22.35 g/hm2). In the case of skin hydration the lowest values were observed for the thorax region (2.13 CU), and the highest for the lip region (41.81 CU). For skin pH, the lowest results were obtained in the lumbar region (6.93), and the highest in the lip region (7.96).

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The effect of a synthetic ceramide-2 on transepidermal water loss after stripping or sodium lauryl sulfate treatment: an in vivo study

International Journal of Cosmetic Science ◽

10.1046/j.1467-2494.1997.171697.x ◽

1997 ◽

Vol 19 (1) ◽

pp. 15-26 ◽

Cited By ~ 2

Author(s):

K. LINTNER ◽

P. MONDON ◽

F. GIRARD ◽

C. GIBAUD

Keyword(s):

Water Loss ◽

Sodium Lauryl Sulfate ◽

Transepidermal Water Loss ◽

In Vivo Study ◽

Lauryl Sulfate

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Monitoring Transepidermal Water Loss and Skin Wettedness Factor with Battery-Free NFC Sensor

Sensors ◽

10.3390/s20195549 ◽

2020 ◽

Vol 20 (19) ◽

pp. 5549

Author(s):

Syed Muhammad Ali ◽

Wan-Young Chung

Keyword(s):

Water Loss ◽

Near Field ◽

Experimental Tests ◽

Transepidermal Water Loss ◽

Comfort Level ◽

Skin Wettedness ◽

Moisture Content Level ◽

Indoor And Outdoor Environments ◽

Skin Moisture

The transepidermal water loss (TEWL) and the skin wettedness factor (SWF) are considered parts of a key perspective related to skincare. The former is used to determine the loss of water content from the stratum corneum (SC), while the latter is used to determine the human skin comfort level. Herein, we developed two novel approaches: (1) determination of the TEWL and the SWF based on a battery-free humidity sensor, and (2) the design of a battery-free smart skincare sensor device tag that can harvest energy from a near field communication (NFC)-enabled smartphone, making it a battery-free design approach. The designed skincare device tag has a diameter of 2.6 cm and could harvest energy (~3 V) from the NFC-enabled smartphone. A series of experimental tests involving the participation of eight and six subjects were conducted in vivo for the indoor and outdoor environments, respectively. During the experimental analysis, the skin moisture content level was measured at different times of the day using an android smartphone. The TEWL and SWF values were calculated based on these sensor readings. For the TEWL case: if the skin moisture is high, the TEWL is high, and if the skin moisture is low, the TEWL is low, ensuring that the skin moisture and the TEWL follow the same trend. Our smart skincare device is enclosed in a 3D flexible design print, and it is battery-free with an android application interface that is more convenient to carry outside than other commercially available battery-based devices.

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Collagen Hydrolysate Prepared from Chicken By-Product as a Functional Polymer in Cosmetic Formulation

Molecules ◽

10.3390/molecules26072021 ◽

2021 ◽

Vol 26 (7) ◽

pp. 2021

Author(s):

Aneta Prokopová ◽

Jana Pavlačková ◽

Pavel Mokrejš ◽

Robert Gál

Keyword(s):

Water Loss ◽

Transepidermal Water Loss ◽

Skin Hydration ◽

Skin Elasticity ◽

Cosmetic Products ◽

Collagen Hydrolysate ◽

Carbopol Gel ◽

Cosmetic Formulation ◽

The Right ◽

Positive Effect

Chicken stomachs can be processed into collagen hydrolysate usable in cosmetic products. The aim of the study was to verify the effects of a carbopol gel formulation enriched with 1.0% (w/w) chicken hydrolysate on the properties of the skin in the periorbital area after regular application twice a day for eight weeks in volunteers ageed 50 ± 9 years. Skin hydration, transepidermal water loss (TEWL), skin elasticity and skin relief were evaluated. Overall, skin hydration increased by 11.82% and 9.45%, TEWL decreased by 25.70% and 17.80% (always reported for the right and left area). Generally, there was an increase in skin elasticity, a decrease in skin roughness, as the resonance times decreased by 85%. The average reduction of wrinkles was 35.40% on the right and 41.20% on the left. For all results, it can be seen that the longer the cosmetic gel formulation is applied, the better the results. Due to the positive effect on the quality and functionality of the skin, it is possible to apply the cosmetic gel formulation in the periorbital area. The advantage of the product with chicken collagen hydrolysate is also the biocompatibility with the skin and the biodegradability of the formulation.

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The beneficial effect of Cannabis Sativa seed oil on the epidermis

Current Cosmetic Science ◽

10.2174/2666779701666210408111006 ◽

2021 ◽

Vol 01 ◽

Author(s):

Anna Olejnik ◽

Aleksandra Galarda ◽

Joanna Goscianska

Keyword(s):

Water Loss ◽

Seed Oil ◽

Unsaturated Fatty Acids ◽

Cannabis Sativa ◽

Transepidermal Water Loss ◽

Skin Condition ◽

Moisture Loss ◽

Non Invasive ◽

Oil Formulation

Background: Cannabis Sativa seed oil has become more and more popular in cosmetic industry mainly due to the high content of antioxidants and unsaturated fatty acids that are desirable in formulations because they prevent moisture loss and reduce the occurrence of dry skin. Objective: The aim of this study was to determine the effect of Cannabis Sativa seed oil on skin parameters such as hydration and transepidermal water loss. Methods: The in vivo tests on volunteers with combination skin were performed by using non-invasive methods by using corneometer and tewameter. Results: The obtained results proved that Cannabis Sativa seed oil improved skin condition. The transepidermal water loss decreased because the lipophilic components of the oil formulation tend to form an occlusive layer on the epidermis surface. The highest increase in skin hydration was observed after one week of treatment. Conclusion: These results confirmed that Cannabis Sativa seed oil has strong moisturizing properties and can be recommended as a natural based skin conditioning agent.

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