Saturday, March 16, 2013

Are sunscreens dangerous?

Sunscreens are spending like never before and yet the number of patients with melanoma is steadily increasing. What's the deal? Do not squeeze enough, the sun is dangerous or a problem in the very cream? 

Get a perfect tan today is not just a summer obsession - hunger for sunlit skin lasts all year, and fans of bronze-skinned quench mostly in tanning salons. The nightmare of all dermatologists will not stop even though they have been warning for years that the sun from tanning beds is extremely dangerous for the skin. Number of patients with melanoma in the U.S. is therefore more common among young women - the most common form of cancer in young people.

Scientists from the University of Michigan say they have frequent visitors to tanning beds three times the risk of developing skin cancer than those who do not go to the tanning salon.

No tanning bed is just one of the problems. What about creams? Today we can choose creams with particles that deflect UV rays from the skin or chemical substances that are absorbed into the skin and reversed action of sunlight in contact with skin or those that combine both effects.

But the paradox is that the latest creams combine the protective effects themselves, create new health concerns. Some experts have found that chemicals that inactivate effects of ultraviolet (cinnamates, benzophenones and amino benzoic acid) react badly to sunlight when they are absorbed into the skin which can lead to DNA damage.

The team, from the University of California suggests that chemical filters in popular creams can stimulate free radical damage that makes the skin more prone to develop tumors. No adverse action occurs only when the UV rays come into contact with chemical particles that are adsorbed to the skin, and not with those of the skin.

In addition, a Swedish study showed that benzophenone-3 (B-3), a popular ingredient in many sunscreen, found in the urine of people who have inflicted the normal recommended dose of cream and up to 48 hours after painting the body. Yet experts assure us that the chemicals are harmless to us.

And there is nanotechnology. Thus, titanium and zinc oxide nanoparticles dispersed in, and scientists fear that in this way could enter our body's cells and cause a variety of damage.

Dr.. Michael Prager of the British Association of Cosmetic Doctors believe that the solution is in use on the basis of protecting antioxidant activity. "Antioxidants in the skin can repair DNA damage caused by UV radiation and so prevent the inception of the tumor."

To the dismay of conservative colleagues Prager suggests that the climate of Western Europe does not require application of SPF protection, and that the surface antioxidant quite sufficient substitute.

Sunscreen manufacturers refute his claims stating that it is not enough

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