Are UV rays in tanning beds really safe?
Main Category: Melanoma / Skin CancerArticle Date: 25 Apr 2004 - 0:00 PDT
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Michele Hoard has stayed away from tanning beds and out of the sun since she was diagnosed with malignant melanoma, a deadly form of skin cancer, in January 2003. But when she heard that a tanning salon near her home in Minneapolis was offering a sunless, spray-on self-tanner, she decided that it was worth finding out more about the tanning alternative.
"I walked in and asked the guy at the front desk about it, and he recommended instead that I go into one of the tanning beds for 10 minutes before trying the spray," recalls Hoard, 35. "I said, 'I can't tan; I'm a melanoma survivor."
His response floored her.
"He just waved his hand and said, 'No worries--the tanning beds are good for you because they contain mostly UVA rays, which reduce your risk of cancer.' I couldn't believe he was advocating tanning to someone who'd had skin cancer."
Lisa Whitehead, now 42, bought an indoor-tanning membership and started going every other day because "the manager told me that the beds were FDA-approved and that the indoor rays were safer than the sun because all the bad, cancer-causing agents were filtered out," she says. Four years later, she noticed a black spot on her upper arm and decided it had to be a beauty mark.
"I didn't really think about it until a few months later, when I went to see my dermatologist and she told me I needed to have it biopsied," Whitehead recalls. Two days later, she learned that she had stage 1 melanoma--at age 27.
"I went back into the tanning salon and screamed at them," says Whitehead, now married with two children. "I told them that they had lied and that their beds had given me cancer."
Hoard and Whitehead are not alone. In an investigation into the $5 billion tanning salon industry, Prevention has found that hard-sell tactics and false assurances of safety are luring women into putting themselves at risk for cancer, disfigurement, and worse.
Not only do some industry representatives claim that tanning is safe; they also insist that soaking up ultraviolet radiation from sunlamps is actually good for you. Read on for what you must know to protect yourself--or your teenage daughter--from this dangerous misinformation.
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UV rays are more beneficial than harmful
posted by William Grant, Ph.D. on 26 Apr 2004 at 12:44 amVitamin D is essential for optimal health. Human skin pigmentation has adapted over the ages to prevailing solar ultraviolet radiation (UVR) levels for photoproduction of vitamin D while providing protection against the harmful effects of UVR, such as generation of free radicals.
Thus, those that have lived for millennia near the equator in open fields are very dark, those who live near the equator in the forested Latin American countries are tan, those in the temperate zones, olive, and those near the Arctic circle, very pale.
Unfortunately, countries such as the U.S., Australia, and New Zealand are generally populated by people from higher or lower latitudes who, thus, do not have skin color ideally suited for these countries; they have to be either a bit more guarded in their UVR exposure or, in the case of darker skinned individuals, take extra measures to obtain the requisite levels of vitamin D.
It is estimated that 75-90% of all Americans suffer from vitamin D deficiency during at least part of the year, i.e., levels low enough that they are at increased risk for a number of chronic diseases. Solar UV-B radiation is the major source of vitamin D for most Americans, which explains the 25-40% seasonal variation in circulating vitamin D (lowest in late winter/early spring). Dietary sources, including fatty fish and fortified milk and orange juice, do not provide adequate levels of vitamin D to prevent many types of chronic disease. One would have to drink about 2 quarts of milk a day to obtain adequate levels. In addition, many Americans are lactose intolerant and can’t drink milk.
So, what are the health risks of vitamin D deficiency? Best known are the effects on bone health. Rickets is a disease related to insufficient vitamin D; so are osteopena, osteoporosis, and osteomalacia. In addition, muscle strength depends on vitamin D; many falls among the elderly are due to weak muscles resulting from spending too much time indoors and not getting adequate vitamin D. Muscle pain is more frequent in winter and early spring when solar UVB is weaker.
Over a dozen types of internal cancers, such as breast, colon, gastric, ovarian, prostate, and rectal cancer, can be prevented by UVB and vitamin D. William Grant, Ph.D., has estimated that 40,000 Americans die prematurely from cancer each year and that over 120,000 preventable cases occur that could be prevented with adequate levels of vitamin D.
Multiple sclerosis (MS) is a debilitating disease that affects 400,000 Americans. The prevalence rates in the northern states are about 3 times those in the southern states. Vitamin D reduces both the risk and the symptoms of MS. Grant estimates that half of those with MS in the U.S. would not have developed the disease had they had as much vitamin D as those living in the southern states.
Birth defect diseases are also being increasingly linked to maternal vitamin D deficiency. Many autoimmune diseases and brain order diseases have been found to be associated with excess birth rates in the spring or summer and deficit birth rates in the fall and winter, reflecting the amount of circulating vitamin D during the development of the affected organs or brain.
Grant presented an estimate of the economic burden to the U.S. due to vitamin D deficiency at the NIH vitamin D conference held in October 2003. It is $50 billion per year, while the economic burden due to excess UVR, which is not required for adequate vitamin D production, is only $3 billion.
As for indoor tanning, several points should be realized. First, the spectral distribution of the lamps used in tanning salons mimic that of solar UV, with about 3-5% in the UV-B range (290-315 nm), which initiates the photoproduction of vitamin D. Since between 75 and 90% of Americans are vitamin D deficient during part or all of the year due to geography, season, or lifestyle, most Americans would obtain immediate health benefits from artificial UVB sources. Second, frequency and duration of use of indoor tanning facilities is regulated in the U.S. so that users don’t develop erythema (reddening). Third, the only two studies examining the link between indoor tanning and melanoma in the U.S. found no significant link. The study in the San Francisco Bay Area actually found a slight reduction in risk.
In summary, most Americans suffer from vitamin D deficiency during part or all of the year, in part due to the adverse publicity on the health effects of UVR. They would be well advised to obtain a large fraction of their vitamin D from UVB, natural or artificial, while avoiding overexposure.
For more information, please visit http://www.sunarc.org
Tanning Boots
posted by Abby on 5 Sep 2011 at 11:18 amLove it!!
To the point, articulate, and interesting.
Tan Look is Awesome!
Thanks
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