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Closed When you should go out in the sun?

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Frustrated Burger

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New research shows that to get an optimal vitamin D supplement from the sun at a minimal risk of getting cutaneous malignant melanoma (CMM), the best time of sun exposure is noon.

That means that common health recommendations given by authorities in many countries -- that sun exposure should be avoided for three to five hours around noon and postponed to the afternoon -- could be wrong and may even promote CMM.

This is in part because the action spectrum for CMM is likely to be centered at longer wavelengths than that of vitamin D generation.

Dr. Mercola's Comments:
This is an update for my own personal knowledge as for many years I have advised people to avoid the sun from 10 a.m. to 2 p.m. if they were at risk of sunburn. Well it turns out that this is the case where a little bit of knowledge can actually be dangerous.

Cutaneous malignant melanoma (CMM) is the most serious form of skin cancer, accounting for about three-quarters of all skin cancer deaths.

New research now supports that while avoiding the sun at mid-day will decrease your risk of painful sunburn it will actually increase your cancer risk.

How can this be?

Though he was not an author of the study above, his research found the same findings: that going out in the sun at mid-day is best for your health.

Our recommendation, this is based on work in England and Norway, and the United States, that the optimal time to be in the sun for vitamin D production is near to solar noon as possible. That would be between say 10:00am and 2:00pm.

The reason is two-fold.

First of all, you need a shorter exposure time because the UVB is more intense.

Now, the second reason is that when the sun goes down towards the horizon, the UVB is filtered out much more than the UVA. And it turns out that the long wave of ultraviolet called UVA, which runs from about 320 to 400 nanometers, is highly correlated with melanoma -- where the UVB is the one that produces the vitamin D, and that’s from 290 to 315 nanometers,” Dr. Grant explains.

This is truly a profound concept, and one that is just beginning to permeate through the mainstream media.

For instance, U.S. News & World Report featured an article on time in the sun, and in it Robyn Lucas, an epidemiologist at Australian National University, agreed with these findings.

“I believe we all need a little unprotected time in the sun during the middle hours of the day when the sun is at its highest and UV-B rays can penetrate the atmosphere,” she said.

So let me restate this crucial new information:

If you want to get out in the sun to maximize your vitamin D production, and minimize your risk of malignant melanoma, the middle of the day is the best time and safest time to go.

“Squamous cell carcinoma is linked to lifetime ultraviolet B irradiants, whereas melanoma is linked to lifetime UVA irradiants, or sporadic sun burning in youth and things like that,” Dr. Grant says. “And so dermatologists, by telling people to put on sunscreen and avoid the mid-day sun, were actually giving recommendations that led to increased melanoma. And it’s because they didn’t carefully look at the wavelength dependents related to melanoma. And so they just didn’t figure out that they were giving bad advice.”

Both UVA and UVB can cause tanning and burning, although UVB does so far more rapidly. UVA, however, penetrates your skin more deeply than UVB, and is thought to be a much more important factor in photoaging, wrinkles and skin cancers.

Going Out in the Sun Will Lower Your Cancer Risk … NOT Increase It

Getting about 2,000 IU to 4,000 IU a day of vitamin D can help you to reduce your cancer risk by up to 50 percent!

And according to Dr. Grant, about 30 percent of cancer deaths -- which amounts to 2 million worldwide and 200,000 in the United States -- could be prevented each year with higher levels of vitamin D.

However, most people only get 250-300 IU a day from their diet, so another source -- ideally the sun
keep an eye out for my new book, Dark Deception, which is coming out shortly.
The Role of Vitamin D in Disease Prevention

A growing body of evidence shows that vitamin D plays a crucial role in disease prevention and maintaining optimal health. There are about 30,000 genes in your body, and vitamin D affects nearly 3,000 of them, as well as vitamin D receptors located throughout your body.

According to one large-scale study, optimal Vitamin D levels can slash your risk of cancer by as much as 60 percent. Keeping your levels optimized can help prevent at least 16 different types of cancer, including pancreatic, lung, ovarian, prostate and skin cancers.

How Vitamin D Performance Testing Can Help Optimize Your Health

Is it any wonder then that no matter what disease or condition is investigated, vitamin D appears to play a crucial role? This is why I am so excited about the D*Action Project by GrassrootsHealth. Dr. Robert Heaney is the research director of GrassrootsHealth and is part of the design of the D*action Project as well as analysis of the research findings.

GrassrootsHealth shows how you can take action today on known science with a consensus of experts without waiting for institutional lethargy. It has shown how by combining the science of measurement (of vitamin D levels) with the personal choice of taking action and, the value of education about individual measures that one can truly be in charge of their own health.

In order to spread this health movement to more communities, the project needs your involvement. To participate, simply purchase the D*Action Measurement Kit and follow the registration instructions included. (Please note that 100 percent of the proceeds from the kits go to fund the research project. I do not charge a single dime as a distributor of the test kits.)

As a participant, you agree to test your vitamin D levels twice a year during a five-year study, and share your health status to demonstrate the public health impact of this nutrient. There is a $65 fee every six months for your sponsorship of this research project, which includes a test kit to be used at home, and electronic reports on your ongoing progress. You will get a follow up email every six months reminding you "it's time for your next test and health survey."


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Yun na nga eh kung wala ang init ng araw malabo magkaroon ng buhay sa mundo
Kaya di totoo sinasabi nung isa dito na ang araw ang pumapatay sa tao
partly true pa rin naman siya dun, nacurious ka kaya mo niresearch hahaha
oo nga naman, insufficient knowledge about sa nagagawa ng araw sa balat natin eh dun na nga pupunta, mamatay tayo nang di natin alam.
 
"Human skin can make large amounts of vitamin D when lots of skin is exposed and the sun is high in the sky. Your body is designed to get the vitamin D it needs by producing it when your bare skin is exposed to sunlight. The part of the sun's rays that is important is ultraviolet B (UVB)."
 
partly true pa rin naman siya dun, nacurious ka kaya mo niresearch hahaha
oo nga naman, insufficient knowledge about sa nagagawa ng araw sa balat natin eh dun na nga pupunta, mamatay tayo nang di natin alam.
Pero tingnan mo yong mga tao na nakatira sa tropical karamihan sa mga sakit ay cancer sa colon sa lungs at diabetes
Napaka bihira yong skin cancer. Tulad dito sa atin mga cancer ay dahil sa kinakain
Nagtataka nga ako sa mga magsasaka na palaging babad sa init ng araw
Karamihan namamatay sa sobrang katandaan
 
Pero tingnan mo yong mga tao na nakatira sa tropical karamihan sa mga sakit ay cancer sa colon sa lungs at diabetes
Napaka bihira yong skin cancer. Tulad dito sa atin mga cancer ay dahil sa kinakain
Nagtataka nga ako sa mga magsasaka na palaging babad sa init ng araw
Karamihan namamatay sa sobrang katandaan
ngayon ko lang din nalaman to,
akala ko dati eh, stage two ng skin burn ay skin cancer hahaha
kaya nga yung mga taong ignorante sa impormasyong ito ang pinapatay ng araw
 
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