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Useful Articles & Information

About SPF:

Confused by SPF? (SPF is only associated with UVB exposure, please see our explanation below about the light spectrum)

The New York Times and other media, as well as medical professionals, have come out strongly opposed to ultra high SPF products above the mid 40s. Many countries around the world limit sunscreen levels to between 30 and 50. It is a scientific fact that going from SPF44 to SPF100 will yield less than 1% additional protection, and you expose yourself to a significant amount of unnecessary chemicals. The recommendation is to buy in the SPF40 range and find one that stays on. Read full NY Times article online here.

About Ingredients:

Scientific update on recent media coverage on Avobenzone (Parsol 1789) and Oxybenzone (Benzophenone 3)


About Insect Repellents:

More than 1,000 exposed to dengue in Florida: CDC

In July 2010, Reuters reported that "five percent of the population of Key West, Florida -- more than 1,000 people -- have been infected at some point with the dengue virus, government researchers reported on Tuesday." Read full Reuters article here.

SolRx's insect repellent spray is 14.25% Deet in a 6 oz spray, giving you the least amount of Deet needed to be effective. Click here to purchase.


Other Interesting Articles

University of Texas Study:

Tanning bed users exhibit brain changes and behavior similar to addicts, UT Southwestern researchers find.

DALLAS – Aug. 10, 2011 – People who frequently use tanning beds may be spurred by an addictive neurological reward-and-reinforcement trigger, researchers at UT Southwestern Medical Center have found in a pilot study.

This could explain why some people continue to use tanning beds despite the increased risk of developing melanoma, the most lethal form of skin cancer. The brain activity and corresponding blood flow tracked by UT Southwestern scientists involved in the study is similar to that seen in people addicted to drugs and alcohol.

“Using tanning beds has rewarding effects in the brain so people may feel compelled to persist in the behavior even though it’s bad for them,” said Dr. Bryon Adinoff, professor of psychiatry and senior author of the study available online and in a future print edition of Addiction Biology. “The implication is, ‘If it’s rewarding, then could it also be addictive?’ It’s an important question in the field.”

About 120,000 new cases of melanoma are diagnosed in the U.S. each year, according to the Skin Cancer Foundation. People younger than 30 who use a tanning bed 10 times a year have eight times the risk of developing malignant melanoma. While public knowledge of these dangers has grown, so has the regular use of tanning beds.

In this study, participants used tanning beds on two separate occasions: one time they were exposed to ultraviolet radiation and another time special filters blocked exposure to ultraviolet radiation. Participants did not know on which session they received the real or the filtered ultraviolet exposure. At each visit, participants were asked before and after each session how much they felt like tanning. Participants were also administered a compound that allowed scientists to measure brain blood flow while they were tanning.

Read full article - University of Texas web site.



The full report is titled “Sunscreen and Prevention of Skin Aging. A Randomized Trial.” It is in the 4 June 2013 issue of Annals of Internal Medicine (volume 158, pages 781-790). The authors are M.C.B. Hughes, G.M. Williams, P. Baker, and A.C. Green. 

What is the problem and what is known about it so far?

Changes in the appearance of the skin are known to be influenced by sun exposure and the effects of growing older. Although sunscreen has been shown to protect against skin cancer, whether it can protect against skin aging has not been established. Antioxidants, such as β-carotene, have also been suggested to protect against skin aging, but this has not been well-studied.

Why did the researchers do this particular study?

To find out whether daily sunscreen and β-carotene each protect against skin aging.

How was the study done?

Patients who were younger than 55 years were randomly assigned to a group asked to apply sun-protection factor 15+ sunscreen to their head, neck, arms, and hands each morning and after bathing, after spending more than a few hours in the sun, or after sweating heavily or to a group asked to use sunscreen at their discretion. Participants were also randomly assigned to receive daily β-carotene or placebo pills. Impressions were taken of the backs of participants’ hands at the beginning of the study and 4.5 years later. The impressions were examined for microscopic changes of skin aging by assessors who did not know to which study groups the participants had been assigned.

What did the researchers find?

More participants assigned to daily sunscreen use reported applying sunscreen at least 3 to 4 days each week than did participants in the discretionary-use group. Those in the daily-use group were less likely to have increased skin aging after 4.5 years than were those in the discretionary-use group. No difference in aging was seen between persons who received β-carotene pills and those who received placebo pills.

What were the limitations of the study?

About one third of participants did not have impressions of their skin taken at both the beginning and end of the study; although this did not seem to affect the results, an effect on the findings cannot be conclusively ruled out. The study was too small to confidently conclude a true lack of effect of β-carotene, and a larger or longer study might show a modest benefit or some harm of β-carotene use on skin aging. How these results would apply to people older than 55 years is not certain.

What are the implications of the study?

That daily use of sunscreen seems to protect against skin aging. 

Information about the LIGHT SPECTRUM

Ultraviolet C (UVC)  -100-290nm (nanometers)
These wavelengths are the shortest ultraviolet rays, extending from 100nm to 290 nm, and are the most carcinogenic, but rarely reach the Earth's surface.

Ultraviolet B (UVB) - 290nm - 320 nm
These are the intermediate wavelength of ultraviolet rays and cause the intial appearance of redness, commonly called "sunburn". UVB wavelengths are known to cause skin cancer.  SPF is only associated with UVB exposure.

Ultraviolet A (UVA) - 320  - 400 nm
Though once thought to be essentially harmless, contributing only to a "healthy tan" these longer UVA wavelengths, (near-UV) are now known to represent 90% of harmful ultraviolet rays raching the Earth's surface causing skin cancer, wrinkling and other signs of premature aging.

Visible Light (400nm - 760 nm)
Nearly 50% of the sun's radiation, reaching us at sea level, is within the visible range.  Infrared - "IR" (greater than 760nm to 1,000,000 nm) from above 760nm to infinity, but most of the energy is from 760nm to about 1800nm, comprising more than 40% of the sun's rays reaching us at sea level.

Sunscreen  Vs. The Living Ocean…A losing battle

Most marine animals are mass spawners. Their eggs are positively buoyant and float to the surface. When the eggs hit a layer of sunscreen they’re pretty much toast. Your choices can help to conserve this fragile ecosystem for years to come. By promoting viral infection, sunscreens can potentially play an important role in coral bleaching in areas prone to high levels of recreational use by humans.”

The study is the latest to highlight the extent to which tourism is damaging coral reefs. According to the Worldwide Fund for Nature, a quarter of the world’s coral reefs are at imminent risk of collapse through human pressures; a further quarter is under a longer-term threat of collapse.

 Even low levels of sunscreen can trigger the virus, which can decimate a coral bed in as few as four days.
For More info:

 Twenty thousand tons of sunscreen wash off swimmers, divers, and surfers into the oceans every year, eventually affecting marine life, according to a 2008 study published in Environmental Health Perspectives. And coral reefs are getting especially creamed. Researchers say sunscreens with octinoxate, oxybenzone, parabens, or camphor derivatives are killing hard corals.

For more info go to:

Dr. Warwick L. Morison, a professor of dermatology at Johns Hopkins University and chairman of the photobiology committee for the Skin Cancer Foundation, said in the Times article that he was disappointed that the F.D.A. failed to ban SPF numbers higher than 50 because such products expose people to more irritating sunscreen ingredients without meaningful added protection.

For More Info:

 Use safe sunscreen – one that doesn’t leave a “footprint”. Paraben, cinnamate, benzophenone and a camphor derivative used in these UV skin protectors are seriously endangering the ocean’s coral. Avoid these ingredients and keep the fish safe, too.

For more info:

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