солнцезащитная косметикаToday cosmetics in large quantities are sold in stores and pharmacies. At the sight of shelves with such cosmetics are often just know where to look – before you find dozens of bottles, tubes and jars with various types of sunscreens and lotions.

Until relatively recently, people knew little about sunscreen cosmetics, and many believed its use is not required. Probably most of us parents in childhood during a beach vacation, do not put any special creams, and did not powdered them yourself. Two or three decades ago from sunburn was saved, rest in the shade of umbrellas or trees, or covering the skin with clothing. Today, however, about the need to use sunscreens know almost everything.

Dermatologists constantly say that sunburn and premature skin aging is not the most dangerous of the possible consequences of prolonged sun exposure without proper protection. Skin cancer in recent years is becoming increasingly common disease. Experts estimate that, on average, every fifth person sooner or later ill one or another form of skin cancer. Although most varieties of this disease successfully treated – if, of course, they promptly find yearly skin cancer kills thousands of people. The risk of developing this disease is directly related to ultraviolet light. Fortunately, to limit its impact is very easy – it is enough to regularly use sunscreen cosmetics.

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Myths about sunscreen cosmetics

There are quite a few common myths associated with cosmetics that protect from the sun.

Use sunscreen cosmetics can lead to deficiency of vitamin D. As you know, vitamin D is produced in the human body when exposed to UV radiation. Therefore the origin of this myth is understandable, but dermatologists and other experts do not believe that sunscreen can really cause a significant shortage of this vitamin is at least as long as this assumption is not found scientific studies, and it still belongs to the category of myths. In addition, vitamin D can be obtained from foods such as salmon and eggs, as well as from supplements, so if necessary, its deficiency can always be filled.

If it is cold or cloudy weather, sunscreen use is not necessary. This statement is fundamentally wrong: up to 40% of the solar radiation penetrates even through the thick curtain of clouds. The temperature of the air in any way connected with the power of UV rays – they only affects how a person takes the Sunny weather. This confusion often lead to severe sunburn, if, for example, a person on a clear winter day spends a lot of time outdoors. Especially dangerous in this respect the mountains, where the solar light is perfectly reflected from snow.

The most dangerous is exposure to ultraviolet radiation in childhood and adults to be protected from it’s already too late. In fact, the UV rays are dangerous to humans of any age, and start using sunscreen cosmetics late never.

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SPF and other characteristics sunscreen cosmetics

SPF is the sun protection factor (sun protection factor), which in vessels with cosmetics indicated by numbers. When the sun cosmetics has just started to develop, it was determined empirically, under artificial light, which in its properties has the maximum similarity with the midday sun. To install SPF in specific tools, the time after which began to redden the skin in people who used the cream or lotion, divided by the time over which blotchy skin members of the control group – that is, those who did not use sunscreen.

SPF 15 means that a person who is entitled to such protection, the first signs of sunburn, redness skin appears, on average, over 150 minutes after applying the cream, and the man, who had no cream, such as intense sunlight, the skin will start to turn red after 10 minutes. Accordingly, the higher the SPF, the longer a person can stay in the sun or risking sunburn. However, the choice of cream SPF and other characteristics depends on the skin type – more on that later).

Another important characteristic of sunscreen cosmetics, on what types of ultraviolet radiation it can to defend you. Always choose the creams and lotions that protect against UVA and UVB rays – they are more effectively prevent the problems associated with prolonged exposure to ultraviolet radiation, such as dryness and premature aging of the skin.

When choosing a sunscreen, you should pay attention to the fact that they contain physical or chemical blocks. Many creams and lotions contain both, but in some types of sunscreen cosmetics include blocks of only one type. The following table briefly describes the main differences between these types of blocks.

 

Physical blocks

Chemical blocks

How they work

Diffuse or block the sun’s rays

Absorb the sun’s rays. Some chemical units can also dissipate the sun’s rays, but most just swallow them

Types of UV filters

Titanium dioxide (TiO2)

Zinc oxide (ZnO)

Avobenzone (Avobenzone)

Octinoxate (Octinoxate)

Octyl salicylate (Octisalate)

Oxybenzone (Oxybenzone)

and other

Stability

In General, stable

Most chemical stable blocks. However, some blocks, for example, avobenzone, can change under the influence of sunlight. In combination with other blocks, it becomes more stable

Comedogenicity

Titanium dioxide can cause rashes in some people (if you have pimples after applying mineral cosmetics or sunscreens with titanium dioxide, the most likely cause is this ingredient).

Zinc oxide is considered safe. It can be applied even for problematic and sensitive skin

Chemical blocks, in General, are more likely to cause skin irritation than physical.

In case of contact with eyes, they can cause quite severe burning and watery eyes.

Some chemical units can cause allergic reactions

Protection

Titanium dioxide protects against UVB rays, not provides insufficient protection from UVA rays.

Zinc oxide provides complete protection from UVB and UVA rays.

Protection begins immediately after applying the cream

All chemical units provide protection against UVB and UVA, but the duration of protection depends on the stability of the ingredients, and full of cream or lotion.

Protection begins 20 minutes after applying the cream

Texture

Creams with physical filters are generally opaque, and have a thick texture. It is quite difficult to apply on the skin.

Can leave the skin more or less visible white residue.

Can be easily washed from the skin, because what they need to do quite often

Chemical filters themselves have no color and smell; lotions and creams with these blocks, usually quite liquid

Security

Currently considered to be practically safe

Generally safe, but some chemical units can contribute to the formation of free radicals that cause damage, irritation and premature aging of the skin

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