...tanning creams were bad for skin and lead to skin cancer because the color they produce does nothing to stop UV rays from harming skin cells.
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The Case Against Indoor Tanning
The evidence that ultraviolet radiation causes skin cancer is overwhelming and convincing. Despite this information, the use of indoor tanning devices which emit ultraviolet (UV) light, both in tanning parlors and at home, has never been more popular. Indoor tanning is big business, with tanning trade publications reporting this as a $2 billion-a-year industry in the United States. According to industry estimates, 28 million Americans are tanning indoors annually at about 25,000 tanning salons around the country.
Is It Healthy?
Over the last year, the indoor tanning industry has taken an aggressive stand, claiming that not only is indoor tanning harmless, but that it is actually healthy.
Tanning is an acquired darkening of the skin in response to ultraviolet radiation. The exact mechanism is unknown, though researchers have been able to induce tanning by applying fragments of DNA to animal and human skin. Not all people are capable of developing a tan in response to UV radiation exposure: Very fair-skinned people simply burn and freckle. In those who can tan, the brown pigment melanin is produced and distributed in the superficial portion of the skin (the epidermis) in the days following exposure. The development of this pigment minimally protects the skin against further damage from UV radiation.
This rather minor protection is cited to support the suggestion that a tan is healthy; that is not the case. In fact, the important point is that damage to the DNA must have been produced to create a tan in the first place.
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Public Policy on Tanning
Physicians and medical groups around the world have undertaken extensive campaigns to decrease excessive exposure to ultraviolet light in order to reduce the current epidemic of skin cancer. These efforts have been successful at educating the public. Surveys show there is increasing awareness that ultraviolet light causes skin cancer. Despite this knowledge, tanning indoors and outdoors is more popular than ever. Most studies suggest young women are the most frequent patrons of tanning salons. The development of photo aging and skin cancer will take years to become apparent in these young tanners, while the perceived social value of a tan is apparent immediately. It seems likely the indoor tanning industry will continue to actively market its services, including the rather dubious claim that indoor tanning is not only harmless but is healthy. Regulation of the tanning industry at the state and national level is important, especially to prevent false health claims from being made. Physicians and those concerned about preventing skin cancer can and should continue to play a major role in educating the public about the dangers of tanning, especially directing efforts towards young tanners.
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http://www.skincancer.org/artificial/index.php