Antioxidants

Antioxidants.  Photo from http://creative.gettyimages.com

Anti-aging and disease all at once already exist — will tell you the manufacturers of cosmetics, food additives, as well as some doctors and pharmacists. These substances are really fight free radicals — corrosive molecules that destroy cell membranes of human DNA and cause mutations. But you can not consider them as a panacea: an overdose of anti-oxidants are not less harmful than their absence.

Free radicals

Free radicals are also known as active forms of oxygen, chlorine, nitrogen, lipid peroxides … Typically, it is quite large molecules that have free electron, ready to form a chemical bond, literally, with anything. The targets may be free radicals of the cell membrane lipids and DNA, and proteins. In any case, such a cell is applied molecule serious damage.

Free radicals — are products of incomplete oxidation. They are formed by the action of ultraviolet light, normal light or heat radiation, toxic substances. Some of these active molecules can appear as a result of normal biochemical processes, but then the body can cope with them alone: there is a special enzyme — superoxide dismutase.

If the free radicals too much "power" of superoxide dismutase is missing. In this case, runs a chain of chemical reactions. For example, interacting with the protein, radical not only spoils the molecule, but also leads to formation of a new radical. He re-enters into a chemical reaction, and so on … As a result, healthy cells are killed, the body is aging or even die from the cancer. If only the free radical superoxide dismutase does not appear, or other "trap". And such a trap and called antioxidants.

Where to look Antioxidants?

As antioxidants You can use vitamins E, A and C. Another Nobel laureate Linus Polling believed that large doses of ascorbic acid can significantly prolong life. It is recommended to take up to 10 grams of the vitamin a day, but then a miraculous effect askorbinki confirmed only partially — it does not help everyone and not always.

Now doctors recommend not limited to one antioxidant, and designate complexes of vitamins and minerals that are either "catch" free radicals, or do not give them form. Among the products that possess antioxidant activity, nutritionists recommend berries — especially blueberries, blueberries, raspberries and strawberries, broccoli, tomatoes, red grapes, spinach, carrots, tea, coffee, honey, soy, garlic and whole wheat.

Do not forget about antioxidants not only nutritionists, but also manufacturers of cosmetics. Many probably remember the ad "as the unlucky apple", which highlighted the antioxidant properties of anti-wrinkle cream. It is considered that free radicals are not only cause destruction of cells, heart diseases, atherosclerosis and cancer formation. They are also blamed for the appearance of wrinkles and other signs of aging skin.

But, perhaps, first of all, anti-oxidant, that is, the useful properties have been found in red wine. Consumption of this drink in moderation explain the high life the French — despite the fact that the representatives of this nation the world's highest level of alcohol consumption and smoking is very popular.

Meanwhile, the researchers do not recommend drinking only wine — add a few years of life can and using grape juice. In addition, there is evidence that an overdose of anti-oxidants are not less harmful than free radicals.

Overdose

In 2000, an American researcher has found that antioxidants are harmful especially for chronic diseases. In particular, vitamin With contraindicated in renal diseases. Even a healthy person the purpose of this drug in high doses results in gastrointestinal disorders and urolithiasis. Vitamin E is also not safe — his excessive use of threatening bleeding. A mineral supplement overdose face hair loss.

The researchers believe that too many antioxidants consumed a fairly large number of people. First of all, we are talking about those who keep to a diet while taking multivitamins and various food additives. But, in addition to excessive doses may be dangerous and quite harmless amounts antioxidants.

If the prevention of cancer, these agents are useful, the cancer patients are contraindicated. The fact that the immune system normally fights tumor cells using the same "scary" free radicals. AndAntioxidants only complicate its task.

The same can be said for colds and other infectious diseases — a large dose of vitamins can only hinder recovery. Another thing is that the same vitamin C, in addition to its antioxidant properties, can stimulate the immune system. And understand that when antioxidants are harmful and beneficial when should a doctor. A self-medication, even in this case it is harmless, it is not recommended.

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