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Facts and fables about sunscreen: “Factor 50 is offered for a brown skin’

Next week Monday is the Day of the Sunburn. A nice moment to reflect on the power of the sun and the importance of lubrication. What are the facts and fables in the field of sunscreen? Ten questions to ask dermatologist Noor from the East.

What about sunscreens? Are all the brands equally good?

“No, the effect of sun creams are varies from brand to brand. The Consumers ‘ association last year, extensive research has been done.”

“The difference lies mainly in the type of radiation to which creams protect. Some only protect against UVA radiation and less against uva and UVB radiation. Always choose a brand that on the packaging states that it protects against UVA and UVB radiation.”

Is expensive always better?

“Certainly not. Expensive brands are not necessarily good and cheap is not necessarily bad. I recommend people always to sun creams to buy at the pharmacy. And choose, preferably, a high factor. At least factor 30.”

What does such a factor really?

“The factor says something about the percentage of radiation that the skin is still reached after the coat. Factor 30 means that your skin is still exposed to one-thirtieth of radiation. For the factor of 20 means it is a twentieth, and so on.”

“The higher the factor, the longer you are in the sun you can stay without burning it”
Noor from the East, dermatologist

“The factor has influence on the time that you can spend in the sun without burning. Because there is factor of 30 less radiation to the skin and then reaches for factor 20, factor 30 longer in the sun without burning. Factor 50 can be even longer.”

Does it make sense to lubricate with a factor of 8?

“Not really. Depending on your skin type burns you by a factor of 8 pretty quickly. After a minute or ten, you must then re-lubricate. Nobody does.”

And with factor 50, we are really brown?

“Sure. That is a common misunderstanding. That high factor says something about the amount of radiation to which the skin is achieved. And therefore also about the time that you are in the sun you can spend without burning.”

“Your skin is actually brown. Because he did not burn, he continues to in addition, longer and more beautiful brown.”

Who a high factor sunscreen rubs, will also get a brown skin. (Photo: 123RF)

Some brands claim that you only get one time per day need to be lubricated. Is that right?

“How often you have to lubricate is different for everyone. It depends on your skin type, the factor that you used and what you are in the sun.”

“After swimming or toweling off, you should always reapply the cream. Even though there is ‘water resistant’ on the bottle. Also, if you sweat a lot, you need more lubrication.”

“In the spring burned you faster, because you don’t ‘sunshine’ have built up”
Noor from the East, dermatologist

“The sunshine or uv index also has an influence on the speed at which you burn. Now in the spring burned you faster, because you don’t ‘sunshine’ have built: your skin is not yet accustomed to the sun and has less natural protection. In principle, you should every two to 2.5 hours to reapply the cream.”

How thick should we lubricate for a good protection?

“Not to little. Studies show that people generally economical and to be sloppy with the sunscreen. Economical lubrication gives a lower protection factor than on the packaging. Go to two milligrams per square centimeter of skin. That’s pretty much it.”

A lot of people are too stingy and sloppy with lubrication, while a good layer can make ().

Is it true that the sun protection factor of sunscreen each year to deteriorate after opening?

“On the most bottles state that the cream is only a half a year of ‘good’. That is fortunately not the case, but the protection factor decreases eventually indeed. Among other things, by exposure to heat.”

“Leave the bottle, never in full sun, but keep it in a cool dark place. For example, in the cool box on the beach.”

Sometimes you hear in the media something about cancer-causing chemicals in sunscreen. How is it there now?

“It is often thought that uv filters and other substances in sunscreens are carcinogenic. But there is no scientific proof.”

“There is a number of years ago a study done in which researchers uv-filters in large quantities to mice gave. The question is whether that effect also when people would be measured.”

“But most of all: sunscreen is on the skin. That is something other than through the mouth. Through the skin we get never such large quantities.”

Lubrication so?

“Anyway, it is true that exposure to the sun is more than lubrication. One in five people will develop a form of skin cancer. Especially in children, is lubrication is very important. Burning as a child increases the chance of melanoma later in life.”

Noor from the East, is a dermatologist at Meander Medical Centre in Amersfoort

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In 60 seconds: sunscreen

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