Mastenec (Talc)

Čo je mastenec?

Mastenec je minerál. V rámci kozmetiky a produktoch osobnej starostlivosti sa nachádza napríklad v make-upoch, púdroch, očných tieňoch, rúžoch, krémoch, či dokonca výrobkoch intímnej hygieny. Do zloženia sa pridáva kvôli jeho známej vlastnosti - absorbuje vlhkosť. Zjemňuje konzistenciu výrobkov, zabraňuje hrudkovaniu a dodáva make-upu, či púdrom pigmentáciu.

Jeho riziko spočíva v tom, že môže byť kontaminovaný známym karcinogénom - azbestom. Jediný spôsob ako sa dá táto kontaminácia rozpoznať sú laboratórne testy jednotlivých vzoriek mastenca. Na základe týchto testov sa napríklad zistilo, že až dve tretiny detských púdrov, ktoré boli tesované v Kórei, obsahovali azbest. (1)

Bežní spotrebitelia by mohli na prvý pohľad rozoznať produkt, ktorý neobsahuje azbest, certifikovaný ako 'asbestos-free'. Každopádne aj jeden druh azbestu, známy ako termolit, bol nájdený v kozmetických púdroch označených ako 'termolite-free'. Zdá sa teda, že ani tento prístup k problematike nie je úplne spoľahlivý. (2)(3)

Riziká mastenca

Mastenec môže spôsobovať iritáciu a podráždenie pokožky, tiež môýe spôsobovať systémovú orgánovú toxicitu ať rakovinu.

Irritation: Case studies of infants inhaling talc-containing baby powder showed severe respiratory distress.[13], [14]

Cancer: The International Agency for Research on Cancer lists talc containing asbestos as carcinogenic to humans while perineal use of talc is classified as possibly carcinogenic.[15],[16] Talc use is linked to endometrial and ovarian cancer.[17],[18] Cosmetic talc applied to the pelvic area, from feminine hygiene products or diaper changes, enters the body and can reach distant organs. This may explain why talc has been found in women’s ovaries and pelvic lymph nodes.[19],[20] Genital talc use increases risk of endometrial cancer among postmenopausal women.[21],[22,],[23]  For all women, risk may increase with frequency of use, although this remains contended.[24], [25], [26]

Talc exposure is associated with mesothelioma, a tumor of tissue lining organs such as the lungs, stomach, and heart. Previous talcum exposure is involved in the development and pathogenesis of lung cancer. Workers in the New York talc industry were more likely to develop mesothelioma, which was attributed to inhalation of dust.[27]

Organ system toxicity: Talc elevates lung burden. Talc inhalation can interfere with mechanisms that clean lungs and mitigate inflammation thereby damaging cells and potentially leading to cancer.[28] In human lung epithelial cells, nanoscale talc particles damaged and killed cells while inducing oxidative stress, which is the buildup of harmful molecular agents in the body.[29]Asbestos was found in the lung tissue and lymph nodes of women using cosmetic powders containing talc.[30] Talc exposure, especially via personal care products, can also lead to a diseased respiratory tract as characterized by labored breathing and coughing.[31],[32],[33]

Talc adversely affects the female genital system resulting in infection and inflammation.[34] Talcum powder is toxic to ovarian tissue in rats.[35]

HEALTH CONCERNS: Irritation, cancer, organ system toxicityMORE...

 

VULNERBALE POPULATIONS: Women, infants, children, miners, millers, and processors of talc

REGULATIONS: Talc is restricted in the European Union.[36]

HOW TO AVOID: Avoid personal care and cosmetic products that contain talc if used in the pelvic area. Choose companies that certify their talc is free of asbestos.


Referencie:

(1) Moon M, et al. Risk assessment of baby powder exposure through inhalation. Toxicol. Res., vol. 27, no. 3, pp 137-141, 2011.

(2) Lopez-Galindo A, Viseras C, Cerezo P. Compositional, technical, and safety specifications of clays to be used as pharmaceuticals and cosmetic products. Applied Clay Science, vol. 36, pp 51-63, 2007.

(3) Finley B, Pierce J, Phelka A, Adams R, Paustenbahc D, Thuett K, Barlow C. Evaluation of tremolite asbestos exposures associated with the use of commercial products. Critical Reviews in Toxicology, vol. 42, no. 2, pp 119-146, 2012.

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