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What does it mean?

In several of our posts, I have said more than twice the importance of using sunscreen, since it is the number one factor in skin aging. But do you know what PDD is in your sunscreen? In relation to photoprotection, an expert mentioned that “each time the solar seasons are longer, so that we are increasingly exposed to the sun and the risks of suffering skin problems are greater.” In fact, according to the data, the cases of actinic keratosis have increased a lot and the incidence of skin cancer has multiplied by 20 in the last 20 years.

Most people do not know which rays pass through the crystals and what effect each one has on the skin. In this sense, within the spectrum of light are UVA rays and UVB rays. UVA rays are the ones that cause the most damage to the skin and the ones that are most related to skin cancer. These can pass through clouds and glass. UVB rays are less harmful, they cause sun damage but do not pass through the glass. Infrared and visible light are also harmful and act on the innermost layers of the skin. They are the ones that cause stains. In short, all rays damage the skin so it is essential to use sunscreen even if it is not summer. When choosing the most suitable one, it is important to look at the SPF and PDD.

 

WHAT IS THE PDD IN SOLAR FILTERS?

Better known as Persistent Pigment Darkening.  “Sun protection with a high PDD provides better protection from the damage caused by UVA rays, responsible for sun intolerances, premature skin aging, the appearance of spots or acne and which can lead to an increased risk of cancer of the skin.” Says Paloma Borregón, Dermatologist and Co-Director of the Master of Aesthetic Medicine, Nutrition and Anti-aging at the Madrid Distance University (UDIMA).

A sunscreen with a good SPF / PPD ratio offers the best protection against UV rays. In short and clearer, a combination of these components will make sun damage take 10 times longer to penetrate the skin and damage it. This way you won’t have to touch up every 3 to 4 hours.

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