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Wysłany: Śro 18:55, 28 Sie 2013
Temat postu: woolrich parka What Do Antioxidants Do For Us
John Bradstreet is an experienced Biochemist with extensive knowledge in nutritional supplementation. He is committed to a healthy lifestyle through natural means. To learn more about antioxidants we have included additional links at the bottom of the page to help educate you on the subject. Or you can subscribe to our Vitamin and Supplement Blog where you will find information on topics concerning natural supplementation.
Every cell in our bodies needs oxygen to survive. It is therefore ironic that oxygen is also responsible
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for damaging cells through a process called oxidation. When oxidation occurs "free radicals" are formed with have the ability to damage cells. Free radicals are substances that contain unpaired electrons due to the fact they have either lost or gained an electron. Free radicals occur due to infection or inflammation, certain environmental conditions such as smoking or air pollution of exposure to pesticides and insecticides. When free radicals are allowed to do damage over prolonged periods of time they can lead to diseases such as cancer. Antioxidants are vitamins, minerals and
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sometimes enzymes which are used to reverse the affects of oxidation to some extent. In this article we are going to explore what antioxidants do, how they work to benefit us and what are some of the best sources of antioxidants.
WHAT DOES AN ANTIOXIDANT DO?
Our bodies need
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a constant supply of antioxidants due to the fact that antioxidants are oxidized in order to work. With the increased popularity of cooking shows such as on Food Network many of us have seen chefs cut up a piece of fruit and put some lemon juice on it to keep it from turning brown. The
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change in color from white to brown is due to oxidation. With
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the antioxidant that the lemon juice contains the fruit does not turn brown but maintains its original color. This is basically how antioxidants that we get from the foods that we eat or from supplementation work to protect the cells in our bodies. An antioxidant works basically by neutralizing the free radicals that form as a result of oxidation.
HOW DOES AN ANTIOXIDANT WORK?
When a free radical is formed during oxidation it exists in an unstable state. It has the tendency to release or absorb electrons from
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other living cells. Whenever an electron is released or absorbed another free radical is formed. This is why we need a constant supply of antioxidants to our bodies. The free radicals that where formed continue to do the same thing, thus forming a chain. If allowed to do this over an extended period of time it will end up damaging the living cells. When an antioxidant such as vitamin C or vitamin E is introduced they will
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convert the free radical in its unstable form to a more stable molecule. This process will break the chain of free radicals and stops the oxidation process. In the case of some antioxidant enzymes the process is a little different. Enzymes such as catalase
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and glutathione slow down the rate at which this free radical chain is formed. Once the free radicals that are already formed are stabilized the process of oxidation can be stopped. The mechanism of each antioxidant is specific only on certain types of free radicals. On other types of free radicals the same antioxidant may not be as affective.
WHAT ARE SOURCES OF ANTIOXIDANTS?
Brightly colored fruits and vegetables are rich in antioxidants. There are literally thousands of different antioxidants found in the foods that we eat and each has its own mechanism of neutralizing free radicals although they work as a team. Some of the more common and well known antioxidants we consume in our diets are vitamin C, vitamin E, selenium and beta carotene. These are often referred to as the anti-aging antioxidants due to the fact that they help provide us with youthful looking skin. Nutritionists emphasize the importance of
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fruits and vegetables in our diets because of there antioxidant properties. As the store
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of antioxidants in our bodies is used up neutralizing free radicals we need to constantly replenish them. Some people also receive antioxidants from nutritional supplements. The best food sources of antioxidants would be brightly colored fruits and vegetables such as broccoli, red
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grapes, beets, carrots and tomatoes to name a few.
In conclusion, it is very important that we continually replenish the antioxidants in our bodies through proper diet and supplementation. We have mentioned the positive affects that they can have
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as far as aging but they also provide us with protection against diseases such as cancer, heart disease, Alzheimer's and arthritis.
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