Protective organ, directly subjected to external weathering such the UV, pollution, heat, etc. to name a few, the skin has no choice but to adapt. No matter the circumstances, she has know createder its own conditions of survival and means of self-defense to combat the attacks to which it is the victim on a daily basis. Hard work that she takes very seriously and that she tackles through the establishment of a permanent and continuous adaptation process. But how is it does she take exactly if only to fight UV and heat?
A color chart to adapt to UV
The exhibition skin in the sun obviously offers all kinds of benefits, such as the production of vitamin D, necessary for moral and physical well-being, but also for fertility ! However, UV rays are also very dangerous and directly damage DNA as well as other molecules essential for the regulation and formation of the latter. We may appreciate them for all kinds of benefits regardless of our specific locations on a world scale and our skin colors, suitable sun protection is nonetheless essential to pamper our sun capital and delay the most possible, le skin aging.
He fits therefore to protect yourself on a daily basis the sun's various harmful rays, namely UVA and UVB rays. The former penetrate faster than the latter. They reach the dermis and alter the collagen and elastin, which are responsible for the good elasticity of the skin. With them, say hello to premature aging. Conversely, UVB rays only penetrate the epidermis, allowing the multiplication of keratinocytes - the main cells of our epidermis - and through this, the thickening of the stratum corneum. But that's not all, since they also take the opportunity to stimulate the production of melanin in the form of small lumps. It's from by this UVB exposure than the skin is then protected from solar radiation.
And when it comes to understanding skin color, it is these melanins located in the epidermis and discussed above that we are interested in. But again, their color varies depending on their type, from brown to black for eumelanins and from red to yellow for thees phaeomelanins. This proportion is unique and specific to each person. while the amount of melanocytes is noticeably identical for all. On a completely different note, if you want to understand where the rosy character of your fair skin comes from, you will find answer in the hemoglobin of red blood cells.
The presence of colors of skins and their distribution on the surface of the earth is no accident ! This very distinct gradient of shades and skin tones, going from the equator to the poles, reveals the ability of our skin to adapt to its environment. An infinity of colors which form a continuous color chart. What to say then, Nowadays, or many people live far from the place where their ancestors lived, as do some dark-skinned people who live in places with little sunlight in far northern latitudes. Ultimately, these can be prone to vitamin D deficiency, produced by exposure to the sun. But the same is true for fair-skinned individuals who live in places with strong sunlight on a daily basis. Poorly adapted and less protected to this type of aggression, they can much more easily develop skin cancer.
However, regardless of your skin type, the more you protect it with sun protection and other care, the more you can enjoy beautiful skin for longer. Read our article « Tips for beautiful skin all summer » about sun filters which will give you all the balls to make the right choice when it comes to sunscreens.
Thermoregulation to adapt to the heat
Against excess heat, the skin knew also deploy all the necessary means to protect themselves. Continuously and in all weather, it lowers the internal temperature of the body by eliminating water for balanceder the cellular work which produces heat. Thus, two modes of action echo each other: perspiration and perspiration. For the first, we are talking about permanent water elimination which takes place without any sporting activity. It is a slow and completely insensitive evaporation, whats than oneselfint external conditions, which affects dehydration of the skin. On a daily basis, it is estimated at nearly half a liter, not to mention the loss of water through pulmonary evaporation, which increases this figure. Conversely, sweating occurs in response to exposure to heat, physical exertion, or even emotion. In this regard, the loss of water results from the activity of the sweat glands coupled with surface vasodilation. The skin can eliminate up to one liter of water per day through their channel. Small parenthesis, in the case of an emotion, sweating is on the other hand "Cold" since it is not associated with vasodilation.
And if there is one activity that multiplies this phenomenon tenfold, it is sport who helps supply our cells with nutrients and vitamins. During exercise, the blood supply is stimulated doping so as well the microcirculation blood than lymphatic where all excess toxins hide. Better irrigated, the skin can then benefit from better nutrition and oxygenation of its tissues. It will then function better, heal, but also regenerate. And it is only once properly supplied that the fibroblasts, cells responsible for the manufacture of fibers, will increase their production and with it, the quality of collagen and elastin making our skin prettier, plumper, more firm and more toned.
Lat sweat following the activity athletic evacuates through the pores that automatically expand to facilitate cooling of the body. A good shower is of course essential to remove traces of perspiration and toxins now blocked on the surface of the skin, but not sufficient. Tend to permanently eliminate all impurities from the face, a good gentle exfoliant and / or a good mask with purifying virtues is strongly recommended for ensure better evacuation of toxins deposited by sweating on your skin.
Go ahead, take advantage of the summer to play sports and boost cell renewal, but under the watchful eye of a good screen solar!