Whenever oxygen reacts with substances, a
process known as oxidation takes place.
This is reflected in many substances such as iron rusting, use of gasoline,
extracting energy from food and causing butter to turn rancid. Its power
extracts energy from food enabling our bodies to repair damage, fight
infections, and keep warm. Our brains are especially dependent on oxygen, for without
it we could pass out within 15 seconds. This
damage begins within minutes and may lead us to succumbing to the ravages of
chronic disease, cancer, stroke, heart disease, diabetes, Alzheimer’s and death. A by-product of our bodies’ normal oxygen-fuelled
body sometimes tries to break away for a power trip on its own. Called free radicals, these unstable molecules
can also damage the body. Their helpers include
cigarette smoke, air pollution, X-rays and chemotherapy. Some free radicals are needed as messengers
in regulating immune responses: wound repair, cell growth and many other
functions. Some unstable ones crave
turning the “victim” into a new free radical that oxidizes the cell components,
and may even exterminate them. Our
bodies need certain minerals from outside sources called enzymes to launch a
counter attack.
Enzymes are called essential nutrients which
turn free radicals back into law abiding cellular citizens. Vitamins from food are recruited in this
battle against free radicals. Some vitamins
dissolve only in fats and vitamin E is one of them. Foods from plants contain a host of nutrients
including enzymes. It is interesting to
note that where I now live in Carrington Retirement Home, residents are invited
to a meeting once a month to air any complaints as well as compliments. The dinner meal here includes a green salad,
and choices of roasted meats, mashed or a baked potato and two cooked
vegetables. One resident raised her hand
with this complaint, “Why do we have so much spinach, hardly anyone likes it?” We are served spinach once a week and for
myself I would be happy to have it every day as one of the vegetables. Dr. Stan Kubow, a professor of dietetics
researches antioxidants at McGill University in Montreal, explains,
“Phytochemicals were thought to act as antioxidants by acting with free
radicals, but recently we’ve found out their concentrations in the body are
acting too low to do that because they are poorly absorbed into the bloodstream
and more likely to act only on a genetic level.” Tomorrow’s blog will have more from Dr. Kubow
regarding how free radicals work their damage.
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