As we enter the hot summer months, we begin to feel its value even more. sunscreens,how to protect our body from the scorching rays of the sun protecting Have you ever thought? On these creams SPF, UVA, UVB, PA+ PPDThere are many terms such as and in fact, all these terms offer us important information.
Today you suntan creamon their packaging protection factorsand the suncaused by to damages we will mention. Although their prices have risen to incredible levels we use every day The necessary sunscreens do not only protect our natural skin color or the redness it creates on the body. Let’s see what are sun protection factors and how to measure protection levels Let’s take a close look. At this stage, before looking at which protection expression corresponds to which value, let’s look at the types and effects of sun rays.
What are the types of sun rays and their effects?
Sun rays in the range of 100-400 nanometers reaching the Earth ultraviolet is named. The effects of these rays, which are named according to their wavelengths, also vary. of sunscreensusually on “UV” we see the abbreviation. There are 3 different types of “UV”, which is used as an abbreviation for ultraviolet rays. If these rays are UVA“, ” UVB“, and ” UVC” rays. Now let’s take a closer look at these types of rays.
UVA rays in the range of 315 to 400 nanometers long wavein their necks are rays . These rays are particularly to the lower layers of the skin It has harmful wavelengths that work up to UVA rays that cause irreversible damage to the skin; to dark spots, to the wrinkleand loss of elasticityleading to ” Photoaging”so early aging is at the forefront of its causes. In addition, exposure to UVA rays for long periods of time to skin cancerwhy could it be.
UVB rays are stronger than UVA. short-wave They are rays in the range of 280-315 nanometers, which have lengths. As a result of prolonged exposure hyperpigmentationand collagen lossThese rays cause to the top layer of the skinby influencing with sunburnstogether seriously DNA damageand further processes to skin cancermay cause.
Although UVA and UVB are often mentioned as the same thing, at different frequencies are wavelengths. For this reason, it is necessary to take advantage of different levels of UV protection factors in order to be protected from these rays and to be exposed to their effects at least.
UVC rays are rays with a wavelength of 200-280 nanometers. Unlike other types of rays absorbed in the atmosphereSince UVC rays cannot pass through the ozone layer, they do not harm the human body like others. Ozon layer If it continues to thin, the organs that will suffer the most are the eyes. There is another light wave called UV-GI with a frequency of 254 nanometers. These rays are also antiseptic(microbicidal) properties.
So what exactly is the SPF we see on sunscreens?
SPF, Sun Protection Factorwell Sun Protection Factor means. We are most used to seeing on sunscreen packages and from UV rays duration of protection international term used to designate The effectiveness of a sunscreen is most commonly based on its SPF value. This expression is in sunscreens SPF 15, 30, 50, 100 displayed with values. Protection factors that we see as SPF to UVB rays can provide protection against In other words, if the sunscreen you buy has only SPF value, it shows us that it does not provide protection against UVA rays. In addition to this value, we can understand that according to some terms on sunscreens, the product also provides protection against UVA rays.
What are the terms used for sunscreens that also protect from UVA rays?
With the development of the cosmetics industry, skin care products are produced in many different countries and continents. Therefore, for products in many different geographies, different procedure measurements are applied and standards are determined. of sunscreens UVAin each region to determine their protective effects against radiation different indicators and measurement tests. Since these measurement tests are not universal like SPF, many countries can show different values.
in americato indicate that the sunscreens produced have a protective effect against UVA and UVB rays. Broad SpectrumThe term (Broad Fan) is used.
Unlike Broad Spectrum only from UVA rays Protective creams are also included. Prominent with skin care industry and routines such as Japan and South Korea AsiaIn products of origin, this radiation protection phrase PA+ value is displayed as. Japanese Cosmetic Industry Association to determine the PA+ value livein experiments on organisms (in vivo)developed to use PPDa called measurement testuses.
What is this PPD?
PPD; Persistent Pigment Darkening ; well ” Permanent Pigment Darkening ” means. PPD, a test developed to measure the extent of long-term damage to the skin caused by UVA rays, how long does it take to darken It gives information about how it started. In other continents and countries, this process works a little differently. United Kingdomin Boots Star (Boots Yıldız) measurement system available. in the European Union COLIPAIn the USA, experiments on inanimate organisms approved by the FDA. (in vitro)Three different measurement systems are used based on
What does the PA+ value tell us?
UVAmeasuring the degree of protection PPDequivalent to the results from the test 4 different PA+ values exists. (from PA+ to PA++++ levels) PA+ ranges according to PPD values are as follows:
- PA+ in the PPD 2-4 range
- PA++ in the PPD 4-8 range
- PA+++ in the PPD 8-16 range
- PA++++ for PPD 16 and above
Let’s explain these values with an example. On a sunscreen PPD 5When we see the expression, we protect the user of this product against UVA rays. 5th floormore will keep for a long time means. This value is Equivalent to PA++.
Broad Spectrum(Wide Spectrum) in vitro(includes non-living organisms) UVAIn the experiments performed by exposing the rays to the critical wavelengths, at least 370 nanometers level rays are used. These rays are against UVA rays measure the protection width provides. Wide Fan gets its name from the protection range measurement it makes. Sunscreens using this expression both UVA and UVB It is known to provide protection against radiation. As a result of this measurement, the protection approval of sunscreens produced in the USA is given by the FDA.
United Kingdom‘s Boots Star measurement system without the need for a living organism, made with devices in vitroin experiments UVAUV protection value UVBprotection against radiation by dividing is obtained. Division of protection values (UVA/UVB)The closer the value obtained as a result of the transaction, the closer the product is to the number corresponding to this value. startaking.
on sunscreens produced in Europe. European Unionproving that it complies with the standards UVA seal, COLIPAby approvaltaking .UVA seal on packaging circled UVA iconis displayed as.
What does the SPF value show us?
SPFAs its value increases, the effect of sunscreen and protection time is also increasing. Let’s explain this value through a simple example. Suppose the skin’s natural defense mechanism is 10 minutes. 15 SPFThe duration of protection from sun rays for someone who uses a sunscreen is less than 10 minutes. to 150 minutes will come out. As a result, as the value of the SPF indicator increases, the skin is protected from sunlight. protection periodIt also gets longer. SPF 15A person who uses worth of sunscreen, UVBagainst the rays 15 timesmore long-term protectionIn addition to this equation, the natural protection time of each human skin against UVB and UVA rays may differ.
According to experts, the minimum 15 SPF protectionusing a promising product UVBagainst the rays It protects 93%.However, when this value is 30 SPF, the protection rate does not double. 30 SPFmaximum 97%provides a degree of protection. 50 SPFif 98% provides protection. In fact, the SPF ratio shows us the protection time of the sunscreen more.
Why should we use sunscreen every day?
There is no permanent effect when you use your sunscreen once and leave it. Even if the protection factor value of the cream is maximum A protection rate of 100%not possible. American Academy of Dermatologyand Skin Cancer Foundation, every day at least 15 SPFand PA++ It recommends the use of a sunscreen worth . According to experts, sunscreens with an SPF of 15 and above are needed. all day longseveral times refreshedshould be used.
The damage caused by the sun’s rays ages us.
As a result of damage caused by sun rays 90%rate we are getting old . Experts very fair skinpeople of color UVagainst the rays high risksays they are in the group .Especially people who have many light and dark moles on their body need to have their skin spots and moles checked frequently in order to keep their skin health under control.
In 2012, a 69-year-old male patient Unidirectional Dermatheliosis(Unilateral Dermatohelios) one-way solar agingdisease is diagnosed.
28 years The truck driver, who spent much more time with one half of his face in the sun than the other half, is the subject of an article in The New England Journal of Medicine. As a result of direct exposure of the patient mentioned in the image to UVA and UVB rays for years. your faceonly one halfway throughIt appears to cause advanced aging.
Even this interesting case, which is the subject of the article, alone reminds us of the importance of using sunscreen every day. It is necessary to make a habit of using sunscreen not only in summer but in all seasons.
Experiment on the aging effect of sunlight
A group of scientists who want to measure the aging effect of sunlight organisedaspect suntan cream puts people who use it. Sunscreen for the other group. not using control group is placed. According to the results of this experiment, no not using sunscreenof persons 24%more getting oldhas been observed.
In the light of this information, in the volume the biggestfree radical the damage of the sundamaging of the rays We obtain the result that A sunscreen with an average protection value cannot reverse its retrospective damage by 100%; but damage that has not yet occurredpretty much to prevent effectiveWe can say it is.
Should we use sunscreen every day?
When we look at the result, we see that sunscreens are also important for your health. regardless of the temperature of the air protect us from harmful sun rays affecting our body needs. Based on the knowledge that too much of the Sun is harmful, as in everything else, we regularly using sunscreen needs. Buying a new sunscreen SPFbesides its value UVAagainst the rays that you protectYou have to look at their explanation.
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