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Does
nutrition make a difference in skin rejuvenation
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It would be naive to believe
that changing your nutrition is going to wipe out all your
wrinkles or completely stop skin aging. But it is just as naive
to think that you can eat (or neglect to eat) whatever you want
without any effect on your skin. What you eat affects every
organ in your body and skin is no exception. You may think that
as long as you are using an expensive skin cream with a bunch of
ingredients with scientific-sounding names, your skin will be
properly nourished. Nothing can be further from the truth. While
a skin cream may provide a number of important substances, it is
never enough to ensure a proper, all-round skin nutrition.
Advantages
of nourishing the skin from within
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Every cell in
the human body needs dozens and dozens of nutrients and
metabolites. Some, like vitamins, minerals and essential
amino acids need to come from food. Others are produced by
the body provided it is healthy and properly nourished. No
skin cream can replace that.
-
Applying a
cream with nutrients to the surface of you skin does not
ensure that those nutrients actually penetrate into your
skin cells. They may just "sit there" until your
next shower. How much of the active ingredients actually get
into your skin cells depends on the skin's condition,
concentration of the ingredients, manufacturing technology
and many other factors. This doesn't mean that all topical
preparations are useless -- but they are often unreliable.
On the other hand, when the nutrients are ingested and
absorbed into your bloodstream, they are sure to be
delivered to your skin cells.
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Nutrition has
some effect on the mechanisms of aging of the body as a
whole. Inhibiting these mechanisms slows down the overall
aging process, including the aging of the skin.
-
Nutritients
and foods that benefit your skin also tend to benefit other
body systems and overall health.
Limitations
of nourishing the skin from within
-
Skin aging is
a combination of the mechanisms of aging innate to human
physiology plus the environmental damage from sun, wind and
pollution. Proper nutrition may help partly inhibit
physiological aging but does little to protect the skin from
the outside world. The latter must be achieved by limiting
sun exposure, use of proper (UVA+UVB) sun blocks and other
measures discussed throughout this site.
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It is
impossible to safely achieve much-higher-than-normal
concentration of active ingredients in skin cells through
oral intake. Some skin treatments, particularly those
striving to produce relatively quick and dramatic results,
rely on creating unusually high concentration of active
ingredients in the skin. In most cases, this can be achieved
only through properly done topical application or some
special medical techniques (e.g. electrophoresis) - doing so
through oral treatment is usually either impossible or
unsafe. For instance, vitamin C topical treatments appear to
be effective only at concentrations of 10% or more. Such
concentration cannot be achieved by just bulking up on
vitamin C supplements because vitamin C is quickly excreted
via kidneys. Besides, excessively high doses of vitamin C
may cause serious adverse reactions.
-
Some
potentially beneficial substances are reasonably safe for
topical use but unsafe for ingestion.
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Some
substances, such as peptides and growth factors, are easily
broken down by digestive enzymes. They become inactive after
going through the GI tract and therefore can be used only
topically
-
Some of the
orally taken nutrients may not be properly absorbed via GI
tract. This happens when a person has certain digestive
problems, such as hypo acidity, or when nutrients come from
poorly manufactured supplements. Care should be taken to
ensure proper absorption.
Bottom
line
A balanced nutrition of the
body is important for maintaining healthy skin. It may not
produce striking rejuvenation, but neglecting it will make your
skin age considerably faster. Deficiencies of certain nutrients,
such as vitamin A, B-complex, and essential fatty acids are
known to cause various forms of dermatitis and other skin
conditions. Mild deficiencies, which are very common and often
go unnoticed, may not cause clinical manifestations but clearly
impair the skin's ability to heal and renew itself. Improving
nutrition in a person with sub clinical nutrient deficiencies
often results in a younger looking skin and partial reversal of
some signs of aging. On the other hand, "cutting-edge"
skin rejuvenation treatments are likely to be far less effective
or even completely fail if your skin is deficient in one or more
essential nutrients. (According to some estimates, up to a half
of the population in the developed countries have sub clinical
deficiency of one or more nutrients.) Finally, some nutrients
taken in doses higher than the minimal requirement (but still in
the safe range) may produce skin benefits above and beyond what
the basic balanced nutrition does.
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