Harmful tan: too much sun causes damage to the DNA

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Carlos Laforet Coll
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According to a new study, UV rays cause damage to DNA strands even in the dark, fueling the risk of a tumor.

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La Tintarella would modify the Dna. Summer is approaching a little and we are already talking about tanning and how much it hurts. But what does it have to do with our genetic heritage? Simple: UV rays would cause damage to the DNA strands even in the dark, fueling the risk of a tumor.

It is the result of a new study from Yale University, according to which much of the damage caused by ultraviolet rays to the skin occurs hours. after sun exposure.

Exposure to sunlight (or, even worse, gods tanning beds) can damage the DNA in melanocytes, the cells that make up the melanin that gives the skin its color. In the past, experts believed that melanin protected the skin by blocking harmful UV rays, but now these findings overturn this thesis.

Basically, the energy absorbed under the sun by the skin (melanocytes, in fact) would transfer to the cells in the dark, thus causing deformations to what is the normal cellular structure. Melanocytes are responsible for the production of melanin: however, this substance would also generate the damage they cause increased risk of melanoma.

In short, UV rays have negative effects even after some time and this is due to their ability to trigger two enzymes which combine together to activate an electron in melanin. The energy that is created in this way it is transferred to the DNA even in the dark, causing the same damage produced when you are directly exposed to sunlight (it is appropriate to say "moon tan" ...).

Solution? Yes, put yourself in the sun with all the necessary precautions, but then use a compound that acts as "fire extinguisher“, Capable of suppressing this high-energy state and avoiding cancerous mutations.

“So far our understanding of the problem has been about the need to apply sunscreen before going out in the sun for skin protection. Here a different situation arises, in which it is necessary to add something after leaving the beach, or the tanning bed, which protects the skin for several hours after ", concludes Douglas Brash, dermatologist at Yale University.

In short, if you really need to get a tan, spread on it creams and cremettes before, during and after exposure. A moment of relaxation becomes a struggle: is it really worth it? Well, what is worth remembering is that, in any case, putting ourselves in the sun for a while is important for our body to produce vitamin D necessary for the proper functioning of our body. Starting from the vitamin D synthesized in the skin, our body will give life to a form of superactive vitamin D, able to protect us from the risk of tumors, osteoporosis and autoimmune diseases.

A vicious circle, then? Not really: the sun does no harm if we take it correctly. During exposure to the sun, in addition to the application of suitable sun creams (ecological, non-polluting and respectful of the skin), it would be good not to overdo it or stay there for hours, to avoid redness and sunburn. Always choose the coolest hours and do not exceed. This way you should never regret it.

Germana Carillo

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