Skin functions are very important and contribute to maintain your body’s integrity and balance. These include:
Adequate nutrition is essential to achieve a good structure and proper functioning of the entire body including, obviously, the skin.
The barrier function of the epidermis is located specifically in the stratum corneum (the outermost layer of the epidermis), and the effectiveness of the barrier depends not only on a normal keratinisation, but also on the epidermal lipids, which constitute up to 10% of dry weight. These lipids are derived from the phospholipids of the cell wall and are rich in essential fatty acids, so that the deficiency thereof leads to a loss of normal epidermal impermeability and an increase in water loss.
Keratinisation is also influenced by nutrients such as vitamin A and C and other minerals.
Most people like the sun, and it is true that the sun brings many benefits: it increases the production of vitamin D necessary for the deposit of calcium in the bones, it improves your mood (it is proven that in the countries with little sun the prevalence of depression is greater) and, of course, it gives you a tan. Tanning is the result of the synthesis of melanin, a natural protective substance that absorbs the energy of ultraviolet rays and prevents them from penetrating deeper into the tissues. Thus, melanin is the best protection that exists against the sun.
But if the sun is not taken in moderation and due precautions, it can be a real problem for your health, both in the short and long term.
During the tanning process, ultraviolet radiation kills skin cells and disrupts the function of collagen and elastin. Cutaneous vasodilation can also occur. Sensitivity to sunlight varies according to origin, previous exposure and skin colour, but everyone is vulnerable to some degree to the negative effects of the sun.
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