![\"skin](\"https:\/\/hyfac.fr\/wp-content\/uploads\/2018\/03\/banniere_site_hyfac_intro_themes6.jpg\")
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Moisturizing our skin is part of our daily face and body routine. It is the basis of all cosmetic care. The objectives of hydration are notably when the skin becomes dry, hydration must be reinforced to restore the skin barrier<\/span><\/strong> by reducing the Insensible Water Loss*<\/strong> (PIE).<\/p>\n <\/p>\n The skin represents a physical barrier between the body and the outside environment. It is the stratum corneum<\/span><\/strong> (stratum corneum), the most superficial layer of the epidermis, which ensures this protective role. It is made up of keratin, a very resistant substance (the same as that which makes up our nails and hair). The keratin is arranged like the tiles of a roof. Between these keratin lamellae are fatty substances (fatty acids, ceramides) that seal the skin, preventing water from evaporating. Water is also retained in the epidermis by substances that constitute the natural hydration factor.<\/p>\n The stratum corneum limits water loss and protects against chemical agents, microbes, allergens, external thermal aggression, radiation (UV), pollution, etc. For this barrier to be effective, it is important that it remains well hydrated.<\/p>\n<\/blockquote>\n A hydrolipidic film<\/span><\/strong> covers the surface of the stratum corneum. The water comes from sweat secretion, while the lipids come from the epidermis and sebaceous secretion. It plays a secondary role as a barrier. It is not very present in areas where there are few sebaceous glands.<\/p>\n Lipids fill the intercellular spaces of the stratum corneum. They accumulate on the surface of the corneocytes, and form the lipid cement<\/span><\/strong>. Their absence destroys the skin's barrier function. The objective of a moisturizing product will therefore be :<\/p>\n <\/p>\n The skin as a whole contains 70% d’eau<\/span><\/strong>. Le derme en contient plus de 80% (soit 10% de la totalit\u00e9 de l’eau du corps humain). L’\u00e9piderme contient 65% d’eau, et la couche corn\u00e9e 10 \u00e0 13%.<\/p>\n La diffusion de l’eau se fait en continu, du derme vers l’\u00e9piderme. Le derme fonctionne comme une \u00e9ponge qui alimente l’\u00e9piderme en eau. La diffusion de l’eau se fait ensuite \u00e0 travers l’\u00e9piderme, de fa\u00e7on continue et r\u00e9guli\u00e8re, jusqu\u2019\u00e0 la surface de la peau, o\u00f9 l\u2019eau s\u2019\u00e9vapore.<\/p>\n The dermis remains naturally hydrated. Except in exceptional circumstances, it never loses its water. It is therefore in the epidermis, and particularly in the horny layer (the most superficial layer of the epidermis), which normally contains little water, that the skin dries out. This is the target of moisturizers<\/span><\/strong><\/a>.<\/p>\n <\/p>\n De fa\u00e7on naturelle, le dess\u00e8chement de la couche corn\u00e9e s’intensifie avec l’\u00e2ge. Le skin aging<\/strong><\/span> s’accompagne \u00e0 la fois d’une diminution de l’\u00e9paisseur de l’\u00e9piderme et d\u2019une alt\u00e9ration qualitative de la diff\u00e9renciation des k\u00e9ratinocytes : la peau devient rugueuse et plus fine.<\/p>\n<\/li>\n<\/ul>\n L’daily hygiene<\/strong><\/span> is also frequently involved. Dryness is often caused by the use of soap or detergent gel containing irritating surfactants. Too frequent showers, especially for sportsmen and women, encourage the drying out of the corneal layer.<\/p>\n<\/li>\n<\/ul>\n Chez l’homme, le shaving<\/strong><\/span><\/a>, suivi de l’application de lotion alcoolis\u00e9e, est aussi source de dess\u00e8chement de la peau du visage.<\/p>\n<\/li>\n<\/ul>\n The skin is also very sensitive to climatic conditions<\/strong><\/span>. Le froid et le vent sont des facteurs de dess\u00e8chement, s\u2019accompagnant souvent de sensations d’inconfort et de tiraillements. Le dess\u00e8chement de la peau peut aller jusqu’\u00e0 la dermite irritative, avec apparition de fissures sur les extr\u00e9mit\u00e9s.<\/p>\n<\/li>\n<\/ul>\n The sun<\/strong><\/span><\/a> joue un r\u00f4le particulier. Les UV favorisent l’augmentation de l’\u00e9paisseur de la couche corn\u00e9e, ce qui est, avec la synth\u00e8se de la m\u00e9lanine, un des moyens naturels de sun protection<\/u><\/a>. Cependant, la chaleur intensifie l’\u00e9vaporation et la mauvaise coh\u00e9sion des corn\u00e9ocytes. Cela se traduit par une s\u00e9cheresse de la peau en \u00e9t\u00e9, et souvent, par une desquamation au retour du soleil.<\/p>\n<\/li>\n<\/ul>\n Some treatments<\/strong><\/span> peuvent aussi \u00eatre responsables d\u2019un dess\u00e9chement global de la peau : C\u2019est le cas par exemple des traitements par r\u00e9tino\u00efdes oraux (isotr\u00e9tino\u00efne, acitr\u00e9tine, alitr\u00e9tino\u00efne) ou des traitements topiques utilis\u00e9s pour leurs effets contre l’acn\u00e9<\/a>.<\/p>\n<\/li>\n<\/ul>\n Les facteurs de dess\u00e9chement de l\u2019\u00e9piderme sont donc multiples. La peau s\u00e8che se traduit par une sensation inconfortable, souvent \u00e0 l’origine de picotements, de tiraillements, voire de d\u00e9mangeaisons. La peau a perdu sa surface lisse ; elle est rugueuse au toucher. Elle est moins prot\u00e9g\u00e9e contre les agressions ext\u00e9rieures. Cela peut conduire au maximum \u00e0 l\u2019apparition d\u2019un ecz\u00e9ma.<\/p>\n <\/p>\n Pour garder une peau bien hydrat\u00e9e au niveau du visage, il est recommand\u00e9 de :<\/p>\n Do not use soaps, which are too detergent. Prefer a mild dermatological cleanser, without savon, syndet type<\/a>. On the face, a micellar water<\/a> or milk will be preferred.<\/p>\n<\/li>\n Avoid the application of any substances that aggravate drying. In particular, do not apply perfume, eau de toilette or foaming antiseptic cleansers.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n Moisturize your skin regularly<\/span><\/strong><\/a> avec une cr\u00e8me adapt\u00e9e. Il n\u2019existe pas d\u2019autres moyens d\u2019hydrater la couche corn\u00e9e que l\u2019application quotidienne par une cr\u00e8me hydratante adapt\u00e9e.<\/p>\n<\/li>\n<\/ul>\n Most moisturizing creams will act to maintain the skin barrier in good condition. They therefore contain greasy substance<\/span><\/strong> which will reinforce the cement between the keratin lamellae and moisturizing ingredients<\/span><\/strong>which retain water in the epidermis.<\/p>\n To choose your moisturizer, it is important to consider your skin type<\/span><\/strong> and seasons<\/span><\/strong>. Il existe des cr\u00e8mes adapt\u00e9es \u00e0 toutes circonstances : des cr\u00e8mes riches pour l\u2019hiver, pour la nuit ou lorsque la peau est s\u00e8che, et des cr\u00e8mes l\u00e9g\u00e8res pour le matin, pour les peaux mixtes \u00e0 grasses, ou pour l\u2019\u00e9t\u00e9. Dans la lutte contre le vieillissement de la peau, l\u2019hydratation est le premier geste qui redonne une apparence plus jeune \u00e0 la peau.<\/p>\n In winter<\/a> la peau devient plus s\u00e8che et l\u2019hydratation doit \u00eatre renforc\u00e9e. Le froid perturbe l’action des enzymes qui interviennent dans le m\u00e9tabolisme cutan\u00e9 et se conjugue souvent au vent, ce qui entra\u00eene une lib\u00e9ration d’eau par la couche corn\u00e9e et aggrave la perte en eau. Ce ph\u00e9nom\u00e8ne peut \u00eatre accentu\u00e9 par le chauffage trop intense, responsable d’un air sec. L\u2019alternance d’une chaleur trop importante \u00e0 l’int\u00e9rieur et d’un air froid \u00e0 l’ext\u00e9rieur aggrave encore le ph\u00e9nom\u00e8ne de dess\u00e8chement de la peau. L\u2019hydratation du visage doit donc \u00eatre accentu\u00e9e durant l\u2019hiver en utilisant des richer creams<\/a>.<\/p>\n In summer the sun<\/a>Swimming, swimming pool, sea bathing, more frequent showers, are also a source of water loss. You must not relax the hydration of the skin during the summer. This can be done with a lighter cream<\/a>.<\/p>\n A specific texture is needed for the semi-mucous membranes of the lips<\/span><\/strong>. The \"cream\" forms are often insufficient to ensure comfort at this level. The use of a lip balm<\/a> with a very lipidic texture, is necessary to protect, soothe and repair painful cracks.<\/p>\n <\/p>\n <\/p>\n *PIE : Mesure de la quantit\u00e9 d\u2019eau s\u2019\u00e9vaporant \u00e0 la surface de la peau.<\/em><\/p>\n <\/p>\n Pourquoi est-il important d’hydrater sa peau ? L\u2019hydratation de notre peau fait partie de notre routine quotidienne du visage et du corps. Elle est la base de tout soin cosm\u00e9tique. Les objectifs de l\u2019hydratation sont notamment lorsque la peau devient s\u00e8che, l\u2019hydratation doit \u00eatre renforc\u00e9e pour r\u00e9tablir la barri\u00e8re cutan\u00e9e en diminuant la Perte Insensible\u2026 Read more >>><\/a><\/p>","protected":false},"author":1,"featured_media":4346,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"en-passant","meta":{"_mi_skip_tracking":false,"spay_email":""},"categories":[86],"tags":[],"jetpack_featured_media_url":"https:\/\/hyfac.fr\/wp-content\/uploads\/2018\/03\/banniere_carree_site_hyfac_intro_themes6.jpg","_links":{"self":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts\/4326"}],"collection":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/comments?post=4326"}],"version-history":[{"count":19,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts\/4326\/revisions"}],"predecessor-version":[{"id":15041,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts\/4326\/revisions\/15041"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/media\/4346"}],"wp:attachment":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/media?parent=4326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/categories?post=4326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/tags?post=4326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Qu\u2019est-ce que la barri\u00e8re cutan\u00e9e ?<\/strong><\/span><\/h2>\n
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Water circulation in the skin<\/strong><\/span><\/h2>\n
![\"\"](\"https:\/\/hyfac.fr\/wp-content\/uploads\/2018\/03\/mecanisme-hydratation-peau-hyfac.png\")
<\/p>\nWhat dries out the skin?<\/strong><\/span><\/h3>\n
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Comment bien hydrater l\u2019\u00e9piderme ?<\/strong><\/span><\/h2>\n
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