January 20, 2007
Hello,
I sure hope you find this article as interesting as we did... I
think it is true... and I hope you will take the time to read it and
give us your opinion..!
"Using Sunshine as a
Prescription"
New evidence: 'Safe sun' exposure may reduce cancer... build
vitamin D..!
By MARILYNN MARCHIONE ASSOCIATED PRESS
Scientists are excited about a vitamin again. But unlike fads that
sizzled and fizzled... the evidence this time is strong and keeps
growing.
If it bears out... it will challenge one of medicine's most
fundamental beliefs: that people need to coat themselves with
sunscreen whenever they're in the sun. Doing that may actually
contribute to far more cancer deaths than it prevents... some
researchers think.
The vitamin is D... nicknamed the "Sunshine Vitamin"
because the skin makes it from ultraviolet rays. Sunscreen blocks its
production... but dermatologists and health agencies have long
preached that such lotions are needed to prevent skin cancer..!
"Now some scientists are
questioning that advice"
The
reason is that vitamin D increasingly seems important for preventing
and even treating many types of cancer. In the last three months
alone... four separate studies found it helped protect against
lymphoma and cancers of the prostate... lung and... ironically... the
skin. The strongest evidence is for colon cancer.
Many people aren't getting enough vitamin D. It's hard to do from
food and fortified milk alone... and supplements are problematic.
So the thinking is this: Even if too much sun leads to skin
cancer... which is rarely deadly... too little sun may be worse.
No one is suggesting that people fry on a beach. But many
scientists believe that "safe sun" - - 15 minutes or so a
few times a week without sunscreen -- is not only possible but helpful
to health.
One is Dr. Edward Giovannucci... a Harvard University professor of
medicine and nutrition who laid out his case in a keynote lecture at a
recent American Association for Cancer Research meeting in Anaheim.
His research suggests that vitamin D might help prevent 30 deaths
for each one caused by skin cancer.
"I would challenge anyone to find an area or nutrient or any
factor that has such consistent anti-cancer benefits as vitamin
D..." Giovannucci told the cancer scientists. "The data are
really quite remarkable."
The talk so impressed the American Cancer Society's chief
epidemiologist... Dr. Michael Thun... that the society is reviewing
its sun protection guidelines. "There is now intriguing evidence
that vitamin D may have a role in the prevention as well as treatment
of certain cancers..." Thun said.
Even some dermatologists may be coming around. "I find the
evidence to be mounting and increasingly compelling..." said Dr.
Allan Halpern... dermatology chief at New York's Memorial
Sloan-Kettering Cancer Center. The dilemma... he said... is a lack of
consensus on how much vitamin D is needed or the best way to get it.
No source is ideal. Even if sunshine were to be recommended... the
amount needed would depend on the season... time of day... where a
person lives... skin color and other factors.
"People tend to go overboard with even a hint of encouragement
to get more sun exposure..." Thun said... adding that he'd prefer
people get more of the nutrient from food or pills.
But this is difficult. Vitamin D occurs naturally in salmon... tuna
and other oily fish... and is routinely added to milk. However... diet
accounts for very little of the vitamin D circulating in blood...
Giovannucci said.
Supplements contain the nutrient... but most use an old form -- D-2
-- that is far less potent than the more desirable D-3.
Multivitamins typically contain only small amounts of D-2 and
include vitamin A... which offsets many of D's benefits.
As a result... pills might not raise vitamin D levels very much.
Government advisers can't even agree on an RDA... or recommended
daily allowance for vitamin D. Instead... they say "adequate
intake" is 200 international units a day up to age 50... 400 IUs
for ages 50 to 70... and 600 IUs for people over 70.
Many scientists think adults need 1,000 IUs a day. Giovannucci's
research suggests 1,500 IUs might be needed to significantly curb
cancer.
How vitamin D may do this is still under study... but there are
lots of reasons to think it can:
Several studies observing large groups of people found that those
with higher vitamin D levels also had lower rates of cancer.
For some of these studies... doctors had blood samples to measure
vitamin D... making the findings particularly strong. Even so... these
studies aren't the gold standard of medical research. In the past...
the best research has deflated health claims involving other
nutrients... including vitamin E and beta carotene.
Lab and animal studies show that vitamin D stifles abnormal cell
growth... helps cells die when they are supposed to... and curbs
formation of blood vessels that feed tumors.
Cancer is more common in the elderly... and the skin makes less
vitamin D as people age.
Blacks have higher rates of cancer than whites and more pigment in
their skin... which prevents them from making much vitamin D.
Vitamin D gets trapped in fat... so obese people have lower blood
levels of D. They also have higher rates of cancer.
Diabetics... too... are prone to cancer... and their damaged
kidneys have trouble converting vitamin D into a form the body can
use.
People in the northeastern United States and northerly regions of
the globe like Scandinavia have higher cancer rates than those who get
more sunshine year- round.
During short winter days... the sun's rays come in at too oblique
an angle to spur the skin to make vitamin D. That is why nutrition
experts think vitamin D-3 supplements may be especially helpful during
winter... and for dark-skinned people all the time.
Skin cancer is rarely fatal... he notes. The most deadly form...
melanoma... accounts for only 7,770 of the 570,280 cancer deaths
expected to occur in the United States this year.
"The statement that 'no sun exposure is good' I don't think is
correct anymore..." said Dr. Henry Lim... chairman of dermatology
at Henry Ford Health System in Detroit and an academy vice president.
Some wonder if vitamin D may turn out to be like another vitamin...
folate. High intake of it was once thought to be important mostly for
pregnant women... to prevent birth defects. However... since food
makers began adding extra folate to flour in 1998... heart disease...
stroke... colon cancer and osteoporosis have all fallen... suggesting
the general public may have been folate-deficient after all.
About a dozen major studies are under way to test vitamin D's
ability to ward off cancer... said Dr. Peter Greenwald... chief of
cancer prevention for the National Cancer Institute. Several others
are testing its potential to treat the disease. Two recent studies
reported encouraging signs in prostate and lung cancer.
As for sunshine... experts recommend moderation until more evidence
is in hand.
"The skin can handle it... just like the liver can handle
alcohol..." said Dr. James Leyden... professor emeritus of
dermatology at the University of Pennsylvania... who has consulted for
sunscreen makers. "I like to have wine with dinner... but I don't
think I should drink four bottles a day."
Please take a moment to Click
Here and let us know what you think about being in the sun now
after having read this article... won't you..?
As always.... if you have a healthy interest in naturism or social
nudism and you would like to Join
the Sun Devils... or if I may answer any questions or be of
service in any way... please don't hesitate to contact me.

Vera... the Sun Devil
Diablo Sun Devils Naturist Club
phone: 925-684-4400