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Free
Radicals Damage Our Skin
According to many
researchers, free radicals may be the actual cause of
all disease - including the process of aging itself. Evidence
suggests that growing old might just be a side effect of oxidative
stress. The same
process that causes cut apples to turn brown or iron to rust, causes
aging signs such as thinning skin, wrinkles, and stiff joints, and even
hardening of the arteries.
When cells are exposed
to oxidative stress, the result is a free radical. Structurally, a
free radical is an atom or molecule which has an unpaired electron in
it's outer ring; it is a extremely reactive and volatile - with a
tremendous amount of energy. With a great deal of force, the free
radical goes looking for an electron to steal from another atom in order
to complete the pairing.
As free radicals slam
into other cells "looking" for an electron, cell
membranes become damaged. The more free radicals "smashing
around", the more damage occurs. Any one free radical may
only exist for a very small amount of time, however, it can set off a
chain reaction damaging millions of cells in the process of creating and
neutralizing free radicals over and over.
Free Radicals and
the Skin
As previously stated, skin, the
largest organ of the human body, serves as a protective wall between the body
and the environment. Destructive free radicals from natural, biological, and
manufactured pollutants pose a constant and serious threat to the skin, with the
most dangerous from the sun itself.
Skin Cancer Rates Continue to
Rise
Rising skin cancer rates, a
serious indicator of skin damage, indicate sunscreens are not protecting the
skin as they should be. Rare before 1950, skin cancer was
well known by the 1980s. One study in Norway documented an increase in melanoma
of 350% among men and 440% among women between 1957 and 1984.
By 1991 sunscreen sales had
reached $380 million, twice that of a decade earlier. Sales continue to rise,
yet the American Cancer Society says skin cancer has grown to be the most
prevalent of all cancers with 1.3 million new cases annually.
Sunscreens May Make Matters
Worse
Why skin cancer rates continue to
rise remains a question, but clearly sunscreens are not doing the job of
prevention. There are no studies to validate sunscreen's ability to prevent
cancer in humans. Most sunscreens have no ingredients for blocking the UVA rays
that cause melanoma, and some chemical sunscreen ingredients are even suspect as
possible cancer-causing agents.
Photoaging
and Photodamage
Photoaging and photodamage are terms used interchangeably to describe
damage to the skin caused by repeated sun exposure rather than by the
passage of time. Overwhelming laboratory evidence indicates that sun
exposure and other sources of UV (Ultra Violet) radiation play the major
role in causing skin wrinkles, roughness, laxity, mottled pigmentation,
leathery texture, scaling, and sallowness. Cigarette smoking is the only
other environmental factor that has been related to the development of
changes in the skin associated with aging. 1
The sun, although necessary for life, is
also a natural hazard. On average, 80% of lifetime sun exposure occurs
during multiple brief exposures not intended to produce tanning. Most
light-complected Americans show signs of photodamage before 50 years of
age. A significant portion of the estimated $14 billion per year spent in
the United States on cosmetics is specifically intended to conceal the
changes of photoaging. Prevention of photoaging and photodamage may
prevent the progression of changes toward skin cancer. 1
Only
antioxidants can control free radicals, making the difference between healthy
and diseased tissues and influencing how
fast and how well we age.
Antioxidants
Can Combat or Reverse Free Radical Damage
Antioxidants - The Free Radical
Scavengers
Antioxidants are free radical scavengers. They go hunting for free
radicals to neutralize (antioxidant means
"against oxidation"). Their purpose is to give up an electron to
the free radical in order to render the free radical
harmless. Our bodies utilize two different types of
antioxidant defenses: nutrients and enzymes. Antioxidant
enzymes, such as glutathione peroxidase, must be manufactured by the body, but antioxidant nutrients
(such as Vitamin C and E) are used directly from the foods we eat and
supplements we use.
Antioxidants block the process of
oxidation by neutralizing free radicals. In doing so, the antioxidants
themselves become oxidized. That is why there is a constant need to
replenish our antioxidant resources.
"Antioxidants
are designed to keep free radicals from damaging cell walls and other
cell structures, as well as cellular DNA, thus leading to precancers
and cancers." 2
The
Importance of an Antioxidant Network
When an antioxidant
attacks and neutralizes a free radical, the antioxidant benefit of that
particular cell is depleted, and it even turns into a harmless free
radical itself. However, with the proper teaming of antioxidants,
this new free radical is neutralized and regenerated back into a
productive antioxidant able to go out and scavenge for free radicals
again.
"Some
antioxidant vitamins such as vitamin E (a-tocopherol) and vitamin C (ascorbate)
act as "tag team" partners to intercept and neutralize free
radicals. Vitamin E is lipid (fat) soluble and can position itself in
the membrane of cells and lipoproteins where it intercepts free
radicals that attack cell membranes. Once vitamin E has intercepted a
free radical, it can pass the task on to water-soluble vitamin C. In
this manner, vitamin C regenerates the immobile vitamin E in the
membrane and can, in turn, be regenerated by other antioxidant
phytochemicals." 3
Another network antioxidant that plays
an important role is alpha lipoic acid (ALA). It not only recycles
other antioxidants, but it also regenerates itself. Although it is
produced in our bodies, new production of ALA declines as we age and
becomes insufficient to provide its full benefits. ALA boosts the
levels of other network antioxidants.
Networked antioxidants
can recycle or regenerate themselves after they have quenched a free
radical, vastly extending their antioxidant power. The cycle
continues, ensuring that the body will maintain the right antioxidant
balance.
Antioxidants,
Photoaging/Photodamage and the Skin
As stated on the VitaOx home page,
there is a growing amount of evidence showing that topically
applied antioxidants can protect and repair the skin both before and after sun
exposure.
Before Sun Exposure:
According to a 2001 University of California Department of Dermatology publication, human studies have
convincingly demonstrated that topical antioxidants protect the skin from sun
damage when applied before sun exposure. The publication concluded that
regular application of skin care products containing antioxidants may be of
the utmost benefit in protecting our skin from oxidation. 4
After Sun Exposure: According to a news
release in 2002 by the American Academy of Dermatology; the antioxidants
Vitamin C, Vitamin E, and Selenium have been proven
to decrease the effect of the sun on the skin and actually prevent further
damage. The study cited in this news release indicated that applying topical
vitamin C to human skin 15 to 30 minutes after UV exposure decreased sunburn
cells and began repairing the damaged skin. It also mentioned that
topical natural vitamin E was found to reduce the production of: sunburn
cells, chronic UV-induced damage, and cancer causing cells. 2
Summary: The 2001 University of
California Department of Dermatology publication concluded that regular
application of skin care products containing antioxidants may be of the utmost
benefit in protecting our skin from oxidation. 4
Several components in the VitaOx network of antioxidants have been shown
to help prevent and repair sun damage (or photoaging) to the skin. Some of these
are:
- Vitamin C
Topical vitamin C can prevent the consequences of prolonged sun exposure
which can lead to skin cancer. A recent study showed that by applying topical
vitamin C to human skin, 15 to 30 minutes after UV exposure, sunburn cells
decreased and repair work began on the damaged skin.2
- Vitamin E
When
combined with vitamin C, both vitamins create a highly protective lotion
against sun damage. New laboratory research has shown that as an antioxidant, vitamin E helps
inactivate free radicals. There have also been numerous studies that show that
topical natural vitamin E, also called d-alpha-tocopherol, reduces sunburn
cell production, chronic UV-induced damage and the production of cancer
causing cells. 2
- Selenium
Selenium activates an antioxidant enzyme called glutathione peroxidase,
which may help protect the body from cancer. Selenium enhances the
antioxidant effect of vitamin E. Recent studies have found that
when taken orally or applied topically in the form L-selenomethionine,
selenium demonstrated protection against both daily and excessive UV damage,
with less burning after exposure. The study also showed that there was a delay
in the onset, and a decrease in the incidence, of skin cancer. 2
Formulated with a network of 11
antioxidants, VitaOx Complex® is a topical antioxidant
supplement that effectively
controls free radicals, reduces skin damage, and maintains skin's youthful
vitality. It is a daily use skin product that is designed to
protect and repair your skin while leaving it looking and feeling great.
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