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Sun Protection Factor: Truths, Myths, and Expert Advice

November 20 2023 – Dr. Luise Berger

The sun emits not only warmth and light but also invisible UV rays that can harm our skin. To protect ourselves, we often reach for sunscreens with a specific sun protection factor (SPF). But what truly lies behind this mysterious term? What myths and misconceptions circulate about it in the world? And how can we most effectively use sunscreens? In this article, we unveil the secret of the sun protection factor, debunk common myths, and share valuable expert tips for optimal sun protection.

What is the sun protection factor?

The sun protection factor (SPF), a crucial component of every sunscreen product, is a key indicator of the level of protection a product offers against UVB radiation.

The numbers that represent the SPF value can vary, such as 20, 30, 50, or even 50+. These numbers result from rigorous testing and indicate how much the duration of sun protection is extended by the product, thus keeping the skin protected from sunburn for a longer period.

To explain it more precisely, the SPF is determined by measuring the minimal erythema dose (MED). The MED is the amount of UVB radiation required to cause minimal skin redness (erythema).
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Myths about the sun protection factor

There are many myths surrounding the sun protection factor and sun protection in general. One widespread misconception is that a higher SPF provides better protection. While a higher SPF does offer longer protection, the difference between an SPF 30 and 50 is not as significant as many people think. An SPF 30 blocks about 97% of UVB rays, while an SPF 50 blocks about 98%.

Some people mistakenly believe that using sunscreen prevents tanning. That is not true. Sunscreen prevents sunburn but does not block all UV rays responsible for skin tanning.

Furthermore, some people surprisingly think that they don't need sun protection on cloudy days. In reality, up to 80% of UV rays can penetrate clouds, so sun protection is still needed on cloudy days.

It is a common misconception that darker skin tones do not need sun protection. While darker skin tones do contain more melanin, providing some natural protection against UV rays, they are still susceptible to sun damage and skin cancer. Therefore, it's important for people with darker skin to use sunscreen.

Lastly, there is the belief that last year's sunblock is still effective. Most sunscreens have a shelf life of about one year, and their effectiveness may decline after that time. It is recommended to buy a new bottle each year.

That's why DOC.BERGER | EFFECT does not use SPF 50

Many of us look for products with a high sun protection factor (SPF) to protect ourselves from the harmful effects of the sun. However, what many people don't know is that achieving an SPF 50 often requires the use of ingredients that can potentially be hormonally active, allergenic, or irritating. The reason for this lies in the composition of many SPF 50 products on the market. To achieve such a high sun protection factor, chemical UV filters are often used, which are considered potentially hormonally active and can trigger allergies. Additionally, some of these products contain irritating substances that can cause irritation, especially to sensitive skin.

At DOC.BERGER | EFFECT, we firmly believe that effective sun protection is possible without the use of these concerning additives. Our research and development focus on using high-quality, natural ingredients that provide the skin with effective protection against sunlight, blue light, and free radicals without compromising its health. Our Anti-Pollution Day Cream with SPF > 30 is the result of extensive research and testing to provide you with reliable sun protection that is free from controversial additives.

Tips for the correct use of sun protection

It is important to use sunscreen correctly to ensure the best possible protection. Here are some tips:

  • Apply sunscreen 20 to 30 minutes before sun exposure.
  • Use enough sunscreen. An adult needs about 35g for the entire body.
  • Remember to reapply sunscreen regularly, especially after swimming or sweating.
  • Keep in mind that sunscreen is not a license for unlimited sun exposure. Seek shade whenever possible and wear protective clothing.

Proper use of sunscreen and understanding the sun protection factor is essential for the health of our skin. Protect your skin and enjoy the sun responsibly!

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