We forget about 10% of the face and other common mistakes when applying sunscreen

This oversight during the application of cream on the face is evident in the black and white images that researchers at the University of Liverpool have made with an ultraviolet camera, so that areas of skin covered by sunscreen appear dark, while areas without protector are visible. The volunteers in this study put on cream as they usually did. This is, wrongly, forgetting the delicate areas such as the eyelids and the nose nose

And this, if we take into account the fact that between 5 % and 10% of all types of cancer appears on the eyelids, it is worrying. By the way, the researchers recommend, in addition to using the cream, wearing sunglasses, that act as a protective shield against the sun's rays. "It's disturbing that people find that it's so difficult to apply enough sunscreen on the face," says Kevin Hamill, one of the researchers

. It's a It's a good idea to take it seriously because one in five Americans will develop skin cancer. at the lake of his life according to data from the American Academy of Dermatology. According to dermatologists, there is no healthy tan that sees tanning as a sign of injury: "The tanned skin will forever contain cells whose genetic structures have been damaged by the sun."

American Skin Association, which states that only one in three sunbathers use sunscreen . "In the past, the ozone layer of the atmosphere provided protection from sunlight.Layer was reduced due to contamination, the result is that the harmful rays of the sun reach closing more easily and that has produced an increase in all types of cancer, "he says.

That is why it is convenient to have clear information like this:

The phototype is the profile of the person who defines how she will respond to sun exposure. erent, from major to minor, according to this phototype.

Dermatologists have determined the existence of six basic phototypes:

Phototype I : very fair skin, milky white, with freckles, blue and red eyes, which burns easily, never tans and is very sensitive to the sun.

Phototype II : white skin and freckles, blond hair and blue eyes; burn easily and barely tans.

Phototype III : white skin, with the color of blue, green, chestnut or chestnut eyes and hairs of different shades of brown; burns and moderately bronze.

Phototype IV : slightly brownish skin, with dark hair and eyes; burns a little and bronze easily and immediately after exposure to the sun.

Phototype V : dark skin; it is rare that it burns, it will easily and immediately bronze when it is exposed to the sun.

Phototype VI : black skin; it never burns and always has an immediate pigmentation reaction.

SPF (or English SPF) means sun protection factor, and figure, the time you can be exposed to the sun. An SPF 30 does not protect twice as much as a SPF 15. Each degree of SPF refers to the length of time that the skin is protected. A person with slightly pigmented skin that burns in 10 minutes would be protected only about 2.5 hours (SPF 15 x 10 minutes = 150 minutes), as calculated by the American Skin Association.

These calculations depend on each person. There are those who start to burn at the first minute and the others at 10. The degree of SPF multiplies the protection time in as many times as indicated.

The SPF is an indicative measure, but not infallible. Do not forget either the range or the radiation spectrum covered by the protective creams. A broad spectrum cream covers about 93% of UVA ultraviolet rays, but the higher the SPF, the higher the protection range will be. Thus, an index 15 solar filter protects 93% of the ultraviolet rays, while those of the SPF 30 protect 97%, those of the SPF 50 protect 98%. In other words, a person of phototype IV who applies a cream with a SPF of 10 will not be protected, so in the summer, dermatologists recommend the use of creams with SPF 30 and SPF 50 for the face and sensitive areas at least. [19659004Parcontrolcreaturescalled 50+ with an SPF greater than 50, can not be advertised in the United States by order of the FDA (Federal Health Agency) because it considers that of a SPF 50, no additional value of protection is provided.

A product is said to be "water-resistant" (or "water-resistant") when, after two 20-minute baths, it retains at least 70% of the indicated protection factor. And the "very waterproof" ("water proof", in English) allows double, 4 bathrooms of 20 minutes.

The answer is yes. Clouds can even increase the radiation because the humidity creates a reflective effect. On cloudy days, even if we do not see the sun, it is important to be protected.