Sun, pollution, acne and so many other factors attack and alter your skin on a daily basis. It is therefore essential for her to protect herself from it to mitigate the various traumas that she may have suffered.
THE SKIN IS AN ACTUVE ORGAN
The main role of the skin is to protect our entire body from external aggressions every day. By acting as a shield thanks to its various protective barriers, they protect us from various pathogenic microorganisms linked to our environment but also from wind, sun or pollution for example. Unfortunately, all of this impacts and damages your skin. In addition, certain dermatitis such as acne or hyperpigmentation spots also have a role to play in the daily deterioration of your skin.
So even if we don’t see it with the naked eye, it is continually subjected to a multitude of attacks. To deal with it, it has a duty to regenerate and repair itself every day in order to maintain its original integrity and its maximum protective efficacy.
WHEN IS THE SKIN MOST ACTIVE ?
During the day, the skin's role is to fight and protect us from all these various aggressions and at night, contrary to what many thinks, it is not at rest, on the contrary, it is double or even tripled more active. than the day. This is due to the fact that during the night our skin is sheltered from these aggressions, it therefore benefits from a certain tranquility which allows it to set up its various regenerative mechanisms. Thanks to that, she can be on the attack again for the next day. We know today that it would regenerate on average between 11 p.m. and 6 a.m. and that it would peak around one o'clock.
HOW DOES THE SKIN REGENERATE ?
To understand, regeneration refers to all the repair phenomena that the skin uses to regain its integrity. It takes place every day and will allow the skin to rebuild in the face of the various disturbances that it may have suffered during the day. It is distinguished from the scarring which takes place only in the event of wounds or lesions.
Several mechanisms participate in the regeneration and repair of the skin. For example, for the dermal layer, fibroblasts synthesize elastic and collagen fibers daily to ensure the skin's firmness and elasticity.
Regarding the epidermal layer, its renewal takes place thanks to keratinocyte cells. It all starts with the skin stem cells located at the border between the dermal and epidermal layers. Part of these stem cells will divide in order to spread over this entire layer until they reach the surface of the skin, thus becoming keratinocytes. New and mature, they will be able to fully protect your skin. Once altered, they will be eliminated to make room for the new synthesized cells, this is what is more commonly called flaking.
The other part of stem cells also has an essential role because by continuously staying in their place, they will be able to ensure the permanent renewal of keratinocytes. This renewal takes place on average in 28 days and it is the main mechanism of skin regeneration.
To do this, the skin activates more importantly and always at night, the blood circulation of its micro-vessels in order to increase the nutrient intake of each of these cells.
Furthermore, it is assumed that the renewal of the skin flora would also be maximum in the evening. It is important for the skin to replenish its good bacteria and fungi because they have a real protective role for it. They will protect it from potential viruses, bacteria and pathogenic fungi linked to our environment but also from pollution, the sun or tobacco thanks to their anti-oxidative role.
REGARDING BLACK, MAT AND MIXED SKIN, DO THEY REGENERATE EASILY ?
Unfortunately, black, mat and mixed skin renews more slowly than Caucasian skin. This is partly explained by the fact that certain desquamation mechanisms are more active when the skin has a basic or neutral pH. As the pigmented skins have a slightly more acidic pH, it is considered that their peeling process is on average 2.5 times slower than in Caucasian skins. The resulting accumulation of dead cells therefore slows the renewal of keratinocytes because these new synthesized cells will not be able to lodge on the surface of the skin. Consequently, the physical protective barrier of the skin is less effective.
In addition, their natural dehydration and excess sebum generally present denatures their hydrolipidic film but also their skin flora. These two parameters are also essential elements for the protection of the skin, so we can better understand why black, matte and mixed skin is more sensitive and fragile to external aggressions.
WHAT INFLUENCES THE REGENERATION OF THE SKIN ?
First of all, know that the regeneration of your skin naturally decreases with age. Indeed, dictated by your genetics and conditioned by your natural skin aging, it will slow down independently of your will. We note for example that the duration of desquamation is slowed down and that of cell renewal is extended to more than 30 days. All this hampers the process and the normal duration of skin regeneration.
Certain external factors will also have their role to play such as for example too short nights with repetitions because they do not leave enough time for your skin to obtain an optimal regeneration. And others such as the sun, pollution, blue light from your screens which in the long term excessively damage your skin. It will therefore not be able to repair itself sufficiently and will then be constantly weakened. It will therefore be much more sensitive to all types of dermatitis.
HOW TO HELP OUR SKIN TO REGENERATE ?
It is considered that from 9 p.m., the skin begins to relax its protective barrier function. It becomes more permeable and therefore more receptive to the application of care because their active ingredients can more easily penetrate the skin.