Sunburn is still regarded as a symbol of health. In pursuit of smooth beautiful tan young people spend hours lying on the beach, despite the subsequent pain from sunburn. And this despite the fact that the number of publications about how much UV radiation is harmful to the skin, is growing every day. In the US each year regsitriruetsya 600,000 new cases of malignant melanoma and other types of skin cancer. The main reason for this statistic is considered immoderate passion for youth 60-70 years of sunbathing, which affects now, decades later. Currently, UV-recognized major cause of premature skin aging (photoaging) which occurs earlier than hronostarenie (aging due to age). In this regard, dermatologists strongly recommend young people to avoid excessive UV exposure and regular use of sunscreen. Sponsor of my post site vogel-geluk.nl.
Sunscreens – a cosmetics which contain UV filters or substances which absorb UV radiation of a certain wavelength. Originally sunscreens designed for those who want to sunbathe, not roasted through. In this case, the used UV-B filters (intercepting solar radiation spectrum of UV-rays in the range 290-320 nm). For those who do not want to sunbathe (or afraid of freckles), sun block (sun block) were created, which are not passed to the skin no ultafioleta. The main characteristic of sunscreen, which is always specified in the abstract, is a SPF (sun protection factor) – sun protection factor. It shows how many times longer a person using the tool can be in the sun, not roasted through. Sunburns are caused by UV-B radiation. However, other undesirable effects of UV radiation, such as photo-aging, carcinogenesis and inhibition of local immunity of the skin may be caused by UV-B and UV-A (longer wavelength) radiation.
Using UV-B filter, the man is able to last much longer lie on the beach without further sunburn. However, as a result of his skin is a much larger dose of UV-A ilucheniya than usual. Since UV-A radiation penetrates deeper into the skin, its contribution to the induction of photoaging and carcinogenesis more important. The key is to use UV filters a wide range of actions, or solar bl shackles. However, in such a way to get a tan or very difficult. In this situation, you can give some recommendations:
If the skin tans well and never burns, the use of sunscreen is not necessary, as the melanin itself is an excellent UV filter. If the skin is very bad tans and burns easily, sunburn is better to abstain, since such skin to UV radiation is especially harmful acts. In other cases, you can use a variety of sunscreens, giving preference to a broad spectrum of action.
UV filters are the most common cause of allergic reactions to cosmetic products. Therefore, sensitive skin should choose sunscreen with caution.
The sun protection factor indicates the ability of a UV filter to protect the skin from UV-B radiation. However, it should be remembered that UV-A radiation is also very dangerous.
Reduce the adverse effects of UV radiation on the skin helps antioxidants such as carotenoids. Therefore, before or after intensive UV radiation applied to the skin useful carrot oil (a rich source of carotenoids), vitamin E or oil rich in vitamin E (such as wheat germ oil). To reduce the risk of malignant tumors of the skin allow regular peeling, causing exfoliation of the stratum corneum.
Regulation of sebum
Excessive production of sebum (seborrhea) is a major pathogenetic factor in the development of acne (acne). Sebum production is enhanced under the influence of androgens, so acne most commonly affects adolescents in the transition to adulthood.
Sebum is non-comedogenic itself. However, in the ducts of the sebaceous glands often settle propionobakterii that feed on glycerol. Thus they destroy sebum triglycerides to free fatty acids. Activation of the sebaceous glands increases the proportion of free fatty acids derived from the sebum in the epidermis. This creates a local deficiency of essential fatty acids in the epidermis sebaceous gland duct (sebum lipids do not contain essential fatty acids). This results in hyperkeratosis (thickened stratum corneum – one of the main symptoms of essential fatty acid deficiency). Sebaceous glands clogged exfoliated horny scales, and then melanin, lipofuscin, oxidized lipids. Stagnation of fat in the sebaceous gland creates favorable conditions for bacteria. When you break the shell of the follicle bacteria get into the dermis and cause an inflammatory percent ess. The rate of sebum and reduce phytoestrogens antiandrogens.
Seboreguliruyuschimi properties have some plant extracts – extracts of juniper, sea mustard, rosemary, black poplar, as well as oils containing gamma-linolenic acid – black currant oil, borage, evening primrose (evening primrose). To narrow then apply astringent herbal extracts containing tannins – and p, white willow, birch, beech, gammamelis, laurel, myrtle, sage, eucalyptus, blackcurrant leaves. These extracts possess antiseptic. With the appearance of comedones using specific anti-acne agents, which contain substances that normalize the differentiation of keratinocytes and possessing keratolytic action (isotretinoin, azelaic acid). In the case of an active inflammatory process is recommended antibiotic therapy (Benzoyl peroxide, etc.). Appoint such preparations should a doctor.