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Vrednotenje vpliva kozmetičnih izdelkov za britje na transepidermalno izgubo vode in vitro
ID Sazonov, Lana (Author), ID Gosenca Matjaž, Mirjam (Mentor) More about this mentor... This link opens in a new window, ID Bjelošević Žiberna, Maja (Comentor)

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Abstract
Metode odstranjevanja dlak so se razvile zaradi družbenih, kulturnih in verskih tradicij, zdravstvenih razlogov ter zaradi prizadevanj po izpolnjevanju estetskih standardov. Metode odstranjevanja dlak razdelimo v dve kategoriji: depilacija, s katero odstranimo dlačno steblo in vključuje britje ter kemične depilatorje in epilacija, s katero odstranimo dlačno steblo ter tudi mešiček in čebulico ter vključuje voskanje, odstranjevanje dlak s pinceto, nitkanje, encimsko odstranjevanje dlak, lasersko odstranjevanje dlak in elektrolizo. V diplomskem delu smo vrednotili vpliv različnih kozmetičnih izdelkov za odstranjevanje dlak ter nadalje različnih kozmetičnih oblik na vrednosti transepidermalne izgube vode, tj. pasivne izgube vode skozi zdravo roženo plast, in tako posredno na draženje kože. Vrednotili smo osem različnih izdelkov za odstranjevanje dlak štirih različnih blagovnih znamk v podobnem cenovnem okvirju, in sicer olje za britje za občutljivo kožo, gel za britje intimnega predela za občutljivo kožo, gel za britje z aloe vero in avokadovim oljem, gel za britje za občutljivo kožo, pena za britje z avokadovim oljem in vitaminom E, depilacijska krema s karitejevim maslom, depilacijska krema za občutljivo kožo in depilacijska krema za suho kožo. Meritve smo izvedli s Tewametrom®TM 300 pred nanosom kozmetičnega izdelka in po njegovi odstranitvi. Izdelek smo opredeli kot dražeč, če je razlika med bazalno in končno vrednostjo transepidermalne izgube vode bila večja ali enaka 6 g/hm2. Poskus smo izvedli na modelu prašičje kože in vitro vpete v Franz-ovo difuzijsko celico. Ugotovili smo, da so pri vseh testiranih kozmetičnih izdelkih za britje razlike med bazalno in končno vrednostjo transepidermalne izgube vode manjše od 6 g/hm2, zato jih lahko opredelimo kot nedražeče. Ob upoštevanju rezultatov je olje za britje za občutljivo kožo najbolj ugodna oblika kozmetičnih izdelkov za odstranjevanje dlak, saj so bile končne vrednosti transepidermalne izgube vode približno enake oziroma nižje napram bazalnim vrednostim. Glede na rezultate pri vrednotenju depilacijskih krem lahko depilacijsko kremo za občutljivo kožo in depilacijsko kremo za suho kožo opredelimo kot potencialno dražeče, najverjetneje zaradi vsebnosti kalijevega tioglikolata oziroma tioglikolne kisline. Pri depilacijski kremi s karitejevim maslom so bile končne vrednosti transepidermalne izgube vode primerljive z bazalnimi vrednostmi, in sicer tako pri minimalnem kot maksimalnem času delovanja kreme, kar nakazuje na njene nedražeče učinke na kožo.

Language:Slovenian
Keywords:kozmetični izdelki za odstranjevanje dlak, draženje kože, transepidermalna izguba vode, Franz-ova difuzijska celica
Work type:Bachelor thesis/paper
Organization:FFA - Faculty of Pharmacy
Year:2023
PID:20.500.12556/RUL-149613 This link opens in a new window
Publication date in RUL:08.09.2023
Views:516
Downloads:87
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Secondary language

Language:English
Title:In vitro evaluation of cosmetic shaving products on transepidermal water loss
Abstract:
Methods of hair removal have been developed due to societal, cultural, religious traditions, health reasons, and the pursuit of aesthetic standards. Hair removal methods can be categorized into two groups: depilation, which removes the hair shaft and includes shaving, chemical depilatories; and epilation, which removes the hair shaft as well as follicle, and bulb, and includes methods like waxing, tweezing, threading, enzymatic hair removal, laser hair removal, and electrolysis. In the thesis, we evaluated the impact of different cosmetic hair removal products and further also various cosmetic forms on transepidermal water loss values, which represent passive water loss through the healthy stratum corneum, and thus indirectly impact skin irritation. We assessed eight different hair removal products from four different brands within a similar price range. These products were as follows: sensitive skin shaving oil, intimate area shaving gel for sensitive skin, aloe vera and avocado oil shaving gel, sensitive skin shaving gel, avocado oil and vitamin E shaving foam, shea butter depilatory cream, sensitive skin depilatory cream, and dry skin depilatory cream. Tranespidermal water loss measurements were conducted using the Tewameter® TM 300 before applying the product and after its removal. A formulation was considered irritating if the difference between baseline and final values of transepidermal water loss was greater than or equal to 6 g/hm². In vitro experiments were carried out on porcine skin mounted in a Franz diffusion cell. Our findings revealed that all tested shaving cosmetic products exhibited transepidermal water loss differences between baseline and final values of less than 6 g/hm², categorizing them as non-irritating. Considering the results, the sensitive skin shaving oil appeared to be the most favorable cosmetic hair removal product, as its final values were approximately equal to or lower than baseline values. When evaluating depilatory creams, the sensitive skin and dry skin depilatory creams were identified as potentially irritating hair removal products, likely due to the presence of potassium thioglycolate or thioglycolic acid. The depilatory cream with shea butter demonstrated comparable final values to baseline values, indicating no significant irritation effects observed after both minimum and maximum exposure times.

Keywords:cosmetic hair removal products, skin irritation, transepidermal water loss, Franz diffusion cell

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