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Sunshine can give you wrinkles 'even through a window

By Sean Poulter
Last updated at 8:08 AM on 7th September 2010

中文翻譯： 

It's a well-known fact that shunning the sunscreen and basking in direct sun leads to wrinkles.

But those who thought their skin was shielded while driving, or sitting in a conservatory, could be in for a nasty surprise.

The damage caused by sun coming through glass can be so dramatic that, over time, the side of the face exposed to the rays can end up looking up to seven years older than the other.

Sunburn indoors: Enjoying the sun in a conservatory will still lead to ageing of the skin

Even a few hours sitting in a car during April results in skin damage, according to a study.

The sun's ageing effects during autumn months are also far worse than previously realised, it found.

Glass does block out the sun's UVB rays, but about 50 per cent of UVA rays, associated with burning and ageing, do get through.

Leading dermatologists and photobiologists warn that daily exposure to ultraviolet rays means the skin can age more than twice as quickly as skin that is protected.

There will be more lines and wrinkles, and these will be much deeper around the eyes, nose and mouth.

A team at University College Hospital, Besancon, in France, conducted the first study on how sections of the face age at different rates related to sun exposure.

They demonstrated that a woman office worker or regular driver will age more quickly on the side where the skin faces the sun and heat  -  even through glass. Researchers said: 'Participants showed significantly more clinical signs of facial ageing on one side of their face due to driving or working close to windows over many years.' One, a 62-year-old sales-woman, had been driving two to five hours a day for 33 years to attend client meetings. Researchers found that the side of her face closest to her car window looked more than seven years older than the opposite side. Clinical measurements found more signs of ageing including more, and deeper, wrinkles. If the woman had worked in the UK, the ageing would have been on her right side as the steering wheel here is on the other side of the car.

Another study, by skin experts at Boots, found even a few hours sitting in a car in April resulted in skin damage linked to ageing.

Research by Professor Trevor McMillan and Dr Sarah Allinson at the School of Health and Medicine, Lancaster University, showed that low dose UVA, equivalent to a British autumn day, causes up to a 50-fold increase in the expression of certain genes involved in photoageing - premature ageing of the skin from exposure to UV radiation.
 

Signs can include dark spots, wrinkles, droopy and leathery skin and broken blood vessels.

Professor John Hawk, an Emeritus Professor of dermatological photobiology and UVA expert, said: 'We believe up to 90 per cent of the visible signs of ageing are due to the sun's ultraviolet radiation and more than 95 per cent of these are known to be UVA rays.

'What's needed is a step-change in awareness of the damaging effects all year round, not just during summer holiday season.'

The research is published by Boots, which is introducing UVA sun protection into a line of No 7 moisturisers.

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