Oxidative Stress and Cellular Nutrition
Excerpts from the book: " The Heart of Health; The Principles of Physical Health and Vitality," By Stephen Linsteadt, NHD, CNC
An apple turns brown when cut open due to oxidation. Your
car rusts and eventually falls apart due to oxidation. Your
skin ages and wrinkles due to oxidative stress. Over time,
the cells in your body literally rust and degenerate due to
oxidative stress.
If we allow this process to go unchecked,
we can look forward to suffering from arthritis, diabetes,
Alzheimer's dementia, Parkinson's disease, macular degeneration,
lupus, MS, fibromyalgia, and chronic fatigue or worse yet,
dying from heart disease, stroke or cancer.
The simple truth is that over 70 chronic
degenerative diseases are due to "oxidative stress."
While oxygen is essential for life, there
is also a dark side to oxygen. As oxygen is utilized within
our cells to create energy there is occasionally a charged
oxygen molecule created, called a free radical. This "free
radical" has at least one unpaired electron in its outer
orbit. When free radicals attempt to stabilize themselves
by stealing an electron from a surrounding compound or molecule
a new free radical is formed in its place. In turn the newly
formed radical then looks to return to its ground or neutral
state by stealing an electron from another cellular structure
or molecule. Thus the chain reaction continues and can be
thousands of events long.
A free radical prefers to steal electrons
from the lipid membrane of a cell, initiating a free radical
attack on the cell known as lipid peroxidation.
Free radicals are generated in large quantities
from tobacco smoke, automobile exhaust and other forms of
air pollution. Free radicals are also produced from the food
we eat, particularly from the consumption of hydrogenated
oils like margarine and over-heated fats like French fires,
and other fried foods.
The body normally keeps free radicals in
check by the natural production of antioxidants and by the
pH alkaline buffering systems. Antioxidants readily donate
an electron to the free radical without damaging itself.
For example, one of the antioxidant protection
mechanisms used by the body at the cellular level is the phospholipid
membrane around the cell. This membrane is made from phosphorous,
cholesterol and nitrogen and shields the cell from free radical
attacks. The electrons in the cholesterol fatty acids readily
donate electrons thereby neutralizing the free radicals before
they do any damage to the cell. When this mechanism fails
free radicals damage the cell membrane and it becomes hard
- therefore not allowing the passage of nutrients into the
cell or it becomes fractured resulting in the collapse of
the cell by drainage of the inner fluids. Both situations
will lead to the death of the cell.
Modern research suggests that mutations of
the DNA caused by free radicals are the major contribution
for the development of cancer.
Free Radicals Damage Hormone Receptors, Energy Factories and DNA.
Unchecked free radical damage destroys cells
leading to tissue inflammation.
Tissue inflammation, particularly in the
walls of blood arteries creates a thinning of the arterial
walls on one hand and an inflammatory response on the other
hand that causes a build up of cholesterol at the site, leading
to cardiovascular disease.
When this oxidative stress is allowed to
persist over a prolonged period of time, you will most likely
develop a serious chronic degenerative disease.
Fortunately, we have our own army of antioxidants,
which are able to neutralize free radicals and render them
harmless. In past generations our defense systems were sufficient.
Unfortunately, due to the high level of environmental toxins
that we now face our bodies' defense systems need additional
support.
Most antioxidants come from fruits and vegetables.
Our soils have become depleted of antioxidants and supporting
minerals. Food processing and storage along with our own poor
food choices and preparation have also added to the lack of
antioxidant protection we receive. Therefore, if we now need
400 IU of vitamin E to counter the onslaught of free radicals
from our current environment, we would need to eat 33 heads
of spinach, or 80 avocados, or 5 pounds of wheat germ every
day to achieve this level of vitamin E. In order to obtain
the optimal level of vitamin C of 1200 to 2000 mg daily, we
would need to eat 18 oranges, or 160 apples.
It is clear from the above example that in
order to replenish and maintain healthy levels of antioxidant
protection we must adapt a healthy diet along with complete
and balanced nutritional supplementation. Nutritional supplementation
must be of the highest quality and blended in proper ratios
in order to achieve proper cellular nutrition and protection.
Cellular nutrition simply means providing
the body with all the antioxidants along with the all supporting
B vitamins and antioxidant minerals at optimal levels.
When all of the necessary nutrients are provided
to the cell in a complete and balanced nutritional supplement,
our body's natural antioxidant, immune, and repair systems
are maximized.
Some of the most important nutrients that
should be supplemented daily are:
1. Antioxidant Nutrients
and Supplements
a) Superoxide
dismutase (SOD) is an important inner cellular free-radical
fighting enzyme that is naturally produced by the body. Superoxide
dismutase works with catalase to transform superoxide radicals,
which are the exhaust of the cell's energy production, into
hydrogen peroxide.
b) Glutathione peroxidase* is an important component in the body's
arsenal of antioxidants. It reduces hydrogen peroxide to harmless
water. Glutathione peroxidase is manufactured from nutrients,
such as the amino acid glutamine, that are found in the diet.
Fresh citrus fruits, melons, and colorful vegetables are the
best sources. Glutathione and SOD are both dependent upon
minerals such as selenium.
c) Vitamin E*
is one of the most important antioxidants in the human body
because it helps to maintain strong cell membranes and protects
low-density lipoproteins (LDL) from oxidation.
d) Carotenoid beta-carotene*, the safe provitamin form of vitamin
A. Vitamin A promotes healthy skin, a strong immune system,
and is important for good vision. In addition, lycopene, lutein,
and zeaxanthin are carotenoid antioxidants involved in protecting
against free-radical damage in the eyes and other organs.
e) CoEnzyme Q10 (CoQ10)* is a potent antioxidant and is essential for
energy production in our cells. High levels of CoQ10 are especially
important for a strong cardiovascular system. The body's ability
to synthesize or absorb CoQ10 declines with age.
f) Vitamin C*
is the master water-soluble antioxidant, offering health maintenance
throughout the body.
g) Alpha Lipoic Acid* is a vitamin-like antioxidant that is both fat
and water-soluble. It is easily absorbed through the gut and
transported across cell membranes, it offers protection against
free radicals, both inside and outside the cell. It is also
involved in mitochondrial energy metabolism and recycling
oxidized CoQ10.
h) Grape Seed Extract* contains proanthocyanidins (a form of bioflavonoids)
that are some of the most powerful free-radical scavengers
yet discovered. Grape Seed Extract has also been found to
play a strong role in promoting and maintaining sound cardiovascular
function by protecting plasma LDL from oxidation, maintaining
capillary strength by its antioxidant properties.
i) Garlic*
contains sulfur-rich derivatives of the amino acid cysteine,
which many believe has many health benefits including: inhibiting
the formation of free radicals by supporting the body's free
radical scavenger mechanism and by protecting low density
lipoproteins against oxidation; increasing natural killer-cell
activity and interleukin-2 production, providing support for
the immune system. Garlic is anti-viral, anti-fungal, and
anti-bacterial.
j) Ginko Biloba
provides a mix of bioflavonoids that provide antioxidant activity
in the brain as well as enhancing blood circulation throughout
the body and improving oxygenation to the brain.
2. Minerals*
a) Zinc
is a component of hundreds of enzymes. It is associated with
enzymes involved in carbohydrate, fat and protein metabolism,
as well as DNA and RNA replication. Zinc functions as an antioxidant,
aids in maintaining healthy bone structure, maintains healthy
immune functions, and maintains healthy vision.
b) Selenium
is an essential component of the glutathione peroxidase antioxidant
system and also plays an important role in thryoid hormone
metabolism. Selenium is important for maintaining prostate
health.
c) Magnesium
is an activator of hundreds of enzymes essential to life.
It is essential for the formation and maintenance of healthy
bones and teeth and is involved in the metabolism of carbohydrates
and amino acids. It also plays an important role in neuromuscular
contractions.
d) Chromium
is an important component of the glucose tolerance factor
(GTF) that helps to regulate insulin levels and thus maintain
healthy glucose metabolism. Healthy insulin and glucose levels
are critical for weight management and for sustained energy
levels throughout the day.
e) Iodine
is a crucial component in the synthesis of thyroid hormones,
which regulate metabolism, growth, reproduction, and the synthesis
of protein.
f) Copper
is essential for enzymes that help to synthesize collagen.
Cooper is also a critical component of the enzyme superoxide
dismutase (SOD), which is an important antioxidant in cell
cytoplasm, and acts as a catalyst in the formation of hemoglobin.
g) Manganese
is an important co-factor in the production of glycosaminoglycoans,
compounds that make up connective tissues, bones, arteries,
and other organs. Manganese is an activator of numerous enzymes,
and supplementation with manganese can enhance the SOD enzyme
system to increase antioxidant activity.
h) Vanadium
helps support healthy serum glucose levels and may also support
healthy thyroid function.
3. Hormone Support
a) Essential Fatty Acids (EFA's)* combined with biologically active
amino acids is the best approach to enhancing natural hormone
production. Prostaglandins, also known as eicosanoids, such
as thromboxanes, leukotrienes, and lipoxins are derived from
EFA's sensitize cells to hormones, especially sex hormones.
They are involved in the control the immune system, the nervous
system, the heart, the reproductive system, and the endocrine
system. The balance of omega-3 to omega-6 essential fatty
acids is critical to maintaining optimal eicosanoid biosynthesis.
EFA's may help maintain normal blood pressure and healthy
levels of triglycerides and serum cholesterol. EFA's are incorporated
into the membrane of every cell.
b) Phytoestrogens and Isoflavones* are biologically active chemical compounds
from plants such s grains, legumes, fruit, and vegetables
that bind to the same hormone receptor sites as estrogen.
This helps stabilize hormonal cycles and may promote long-term
reproductive health, both during and after menopause, as well
as help to maintain bone mass. Phytoestrogens play another
important protective role by binding excess estrogens made
in the body, or taken in from the environment via pesticides,
plastics, and other sources of estrogen-like chemicals, to
a protein made in the blood. This reduces the amount of estrogens
available to estrogen-sensitive tissue.
c) Vitamins B3, B6 and C, along with biotin, magnesium, and zinc are
required to convert EFA's into prostaglandins (beneficial
eicosanoids).
d) DIM
The mechanisms for DIM's health benefits primarily involve
the induction of mixed function oxidases and phase II detoxification
enzyme systems by the binding and activation of the arylhydrocarbon
receptor. Some have suggested that DIM may also positively
affect cellular signaling pathways, and thus regulate tumor
promotion and progression. It is becoming increasingly apparent
that dietary supplements like DIM may provide an important
mechanism for maintaining successful aging despite the increasing
levels of xenoestrogenic compounds in our modern world.
4. PH Support
a) Calcium*
is required for proper bone density and is found in the extracellular
fluid and inside the cell where it plays many metabolic roles.
It is an electrolyte. It is alkaline. It is critical to normal
nerve conduction, muscle contraction, blood clotting, and
is essential for producing and activating enzymes and hormones
that regulate digestion, energy, and fat metabolism. Calcium
must always be taken with Vitamin D for proper absorption.
If you find it impossible to change your morning saliva pH
to at least 5.8, then you will need to consider the possibility
that you have a dental infection or heavy
metal toxicity.
Taking too Many Supplements or
the Wrong Kinds of Supplements
Taking too many vitamins may be a problem.
Taking high dosages of specific and isolated nutrients may
also be detrimental to your health. Many people have reported
increases of their symptoms from taking mega-dosages of many
vitamins and minerals.
This is why it is important to know what
is in the supplements you are taking and to be sure you are
taking quality supplements.
* In clinical practice we only recommend
pharmaceutical
grade supplements of the highest quality and blended in
ratios that complement the body's requirements. |