| Résumé : |
Since the spring of 2020, the global health crisis related to COVID-19 has placed the pollution risks of megacities as a secondary concern. Should viruses be considered as an integrted part of pollutants ? They belong to the large family of microtiota such as micro-organisms, bacteria, microbiota such as micro-orgnaisms, bacteria, viruses, fungi, yeast. Hand washing with soap or hydro alcoholic gel, an essential barrier to virus contagion, has become a way of life around the world.
The bactericidal efficacy of cosmetic hygiene products is evaluated in vitro by following the recommendations of bactericidal tests by distinguishing the reduction in viability of Escherichia coli. As for the antiviral activity of a hygiene product, its objectivation seems to be pharmaceuticals.
For the face, the wearing of masks, sometimes amounting to many hours daily, becomes a new parameter to be taken into consideration is assessing the tolerance and effectiveness of cosmetic products. The resulting change in the skin ecosystem is significant and can be akin to close pollution, due to the promoted development of bacteria, friction of tissue, increased CO2 as well as temperature and sebaceous secretion.
For hands, too much use of hydro-alcoholic gels can also cause skin stress. These leave-on hygiene products promote hand dehydraton, which is often put to the test during the winter. Clinical trials can be conducted under normal conditions of use to assess the consequences of these new uses through :
- Use test and self-assessment
- Tolerance tests and expert score evaluation
- Sensory analysis tests with trained or naïve panels
- Biometrological tests to measure the different parameters of skin physiology and in particular the evaluation of the skin barrier function and TEWL, colour, sebum level, hydration, imperfections...
These are the immediate restorative effects that will be studied and the protective effects over a day or a few days of use. The protocols should be adapted to consumers of the skin care product, age lifestyle, skin type...
Pollution has been a major environmental risk to public health in major megacities around the planet for many years. A lot of human activities become a stress factor for nature and human living conditions which lead to various problems such as : respiratory troubles, DNA changes, premature ageing of the skin, among others. The pollution included in the "Exposome concept" has various origins : agriculture, energy production, natural phenomena (volcano eruptions, road transport, fuel combustion, methan synthesis... and the list is so long !) |
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Anti-pollution effect : a complex claim objectivation in GLOBAL PERSONAL CARE, Vol. 22, N° 4 (04/2021)
