Effects of exogenous factors on the skin

The causes of skin changes can be divided into two basic groups - endogenous (intrinsic) and exogenous, or extrinsic. Today's article is dedicated to the second group. The behavior of our skin is influenced by much more elements from the environment than we realize. Although the sun is one of the most influential external factors on our skin, it is not the only one.

UV Radiation

The most important source of UV radiation is the sun - that is clear. Then there are the equally harmful lamps in tanning beds, varnish curing lamps, etc. The radiation emitted by the sun consists of three wavelengths: UVA, UVB and UVC. The good news is that UVC waves, the most destructive ones, are completely absorbed by the ozone layer. UVB radiation reaches us at about 10%. However, ozone hardly stops UVA waves at all.  How much UV reaches the earth depends on the sun's position above the horizon, latitude, altitude, and the time of day and year.

Visible light (400 - 800nm) activates many processes essential for life, but UVA and UVB (280 - 400nm) can cause adverse changes in biological structures. UVC (100 - 280nm) destroys proteins and nucleic acids.

The difference between UV-A and UV-B

- UV-B is absorbed by the epidermis and destroys its structure. It accelerates aging by damaging the basal layer, causing erythema and inflammation.

- UV-A penetrates the epidermis and is only absorbed by the dermis. Changes collagen cross-linking and elastosis. Accelerates aging by damaging capillaries.

Blue Light

A little-known fact is that the effect of blue light (emitted by the screens of electrical appliances) on our skin is even more destructive than UV-A and UV-B because it penetrates all its layers. When choosing a sunscreen, it is worth paying attention that it also protects against blue light.

Environmental pollutants

The anti-pollution "trend" - or so we can call it - has also been popular for some time in cosmetics. Does it make sense to use products with this claim or is it just another marketing gimmick?

Unfortunately it is not a gimmick, but a real problem. In addition, it is impossible to avoid. Smog, which we mean when we talk about pollution in the air, settles not only on the lungs. On the skin as well.

The effects of smog on the skin:
- degrades collagen, elastin and hyaluronic acid
- Causes oxidative stress, breaking down the hydrolipid barrier.
- The skin loses its ability to regenerate
- skin problems such as acne or erythema are aggravated

Cooperation with many beauty salons allows us to say with conviction that loss of elasticity and skin hyper-reactivity are problems faced by more people than years ago. People who are not genetically predisposed to skin problems, for example, feel the impact of external factors. The skin becomes gray, sallow, discolored and inflamed, and in extreme cases, even skin allergies can appear.

Frost and wind

Do you remember when as a child, before going out, your mom used to put a little bit of sunscreen on your cheeks to protect you form frostbite? As an adult, we should remember this too - winter poses a challenge to our skin no less than summer. Although the sun's rays are much lower, rapid temperature changes, cold and wind pose challenges.

The cold slows down the rebuilding of the hydrolipid barrier and the work of the sebaceous glands, so the skin is exposed to dryness even more than in summer, although apparently we lose more water in summer. The protective functions of the barrier work less effectively due to a smaller amount of intercellular lipids in the stratum corneum. As you probably remember from the articles about dry skin and oily skin, the "oiliness" of our skin depends on the amount of lipids. When there are too many of them, we talk about oily skin, and when there are too few - about dry skin. Their amount also changes with temperature. During the year, just as we adjust our wardrobe, so we should change our cosmetics. Light cosmetics that work well in the summer, in winter should be changed to a slightly fatter, to support the hydrolipid barrier of our skin.


We debunk the often repeated theory that moisturizing creams should not be used in winter because the water they contain can freeze in subzero temperatures. Most of the water evaporates a short while after applying the cream.

Air conditioning and heating

                Regardless of the season, we challenge our skin ourselves. When it's too cold, we turn on the heat. When it is too hot, we activate the air conditioning. The result is a rapidly changing temperature around us. After all, you have to leave the warm house in winter and you can't hide in an air-conditioned office all summer. Because of these changes, our blood starts circulating faster. There is a risk that the blood vessels cannot withstand the pressure and start to burst. Ask people with vascular skin about the problems they experience with it. Hypersensitivity to external factors, as well as many active ingredients contained in creams, manifested by extensive erythema that disappears very slowly.


Like always, we go out of our way to meet demand. None of our products were created because of a "trend". Years of experience from both our mentor, Dr Waldemar Jankowiak, and our team of cosmetologists in the industry allow us to learn about current problems and find solutions to them. To cope with the above problems, we recommend:

- City line
Comprehensive care, which includes day cream, night cream, eye cream and a mist, which is becoming more and more popular. The series protects against the harmful effects of pollution, moisturizes and nourishes the skin, leaving it healthy and radiant.

- City SUN
The sunscreen from the City line - City SUN - is also worth mentioning. It is an ideal radiation protection for people living in the city - effective, protects against all types of radiation, moisturizes, absorbs quickly and does not leave skin white.

- Sacha butter
A line of face and body butters in four different scents that wins the heart of everyone who has a chance to test them. The composition full of the most valuable oils in cosmetics strongly regenerates, nourishes and protects the skin from drying out. Our customers praise it as a lip balm.

- S.O.S.
A cream accelerating the regeneration of the epidermis, which is worth having with you regardless of the season. In summer it will help with sunburn, in winter it will regenerate frost-dry skin. It was created for use after aesthetic medicine procedures, so it is also recommended in professional beauty salons.

Did you find something that surprised you or did you know all about exogenous factors and their influence on our skin?

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