One of the major chemical processes happening in a human body are oxidation reactions. They go with participation of fats and carbohydrates which we receive from food, and the oxygen getting to us from air. A main goal of such reactions is obtaining the energy necessary for life activity. Unfortunately, as a result of these processes dangerous by-products – so-called free radicals are allocated. To minimize harm which they can cause special substances – antioxidants are necessary for the person.
The free radical is a molecule of oxygen which external cover is deprived of one of electrons. Such molecule has extremely high chemical activity: she aims to come into contact with any other molecule to take away from her a missing electron. At the same time there is the avalanche process, and the particles deprived of electrons become more and more. In an organism the events leading to disbalance of a metabolism and disturbance of cellular membranes that can entail the general deterioration in health, development of diseases of internals, emergence of malignant new growths and a senilism begin to result.
The human body excretes a number of substances which molecules are capable to contact to free radicals, transferring them to a stable state, but at the same time without losing electrons. These substances are called antioxidants. For example, some enzymes and hormones have similar properties. Normal they are enough to maintain concentration of free radicals at the level, safe for health, but over time the antioxidants produced by a human body become insufficiently, and there is a need for their receipt from the outside (with food). The major factors reducing the level of natural antioxidants are diseases (chronic and infectious), residence in areas with a bad ecological situation, a physical overstrain, stresses, addictions, work with toxics.
Interest in antioxidants constantly grows, but most of our fellow citizens know a little about these substances. Besides, there is a set of myths which considerable part producers of various nutritional supplements and other "miracle" means specially extend for the purpose of increase in sales of the products. Here some of the most known delusions concerning antioxidants:
Contrary to popular belief, free radicals are not a certain absolute evil at all. On the contrary, specialists claim that these molecules can bring a certain benefit (for example, to help to fight against pathogenic microorganisms). It is important that in an organism there was no their surplus.
In the absence of a serious illness it is possible to receive all antioxidants necessary for an organism from food. For this purpose it is necessary to adhere to a normal diet and to make a diet so that in it there was enough vegetables, fruit, grain. For a long time to keep working capacity, it is important to lead a healthy lifestyle, to play sports, to try to avoid stresses. Use of the dietary supplements containing antioxidants not only is optional, but it can even be dangerous therefore the doctor has to appoint their reception.
According to researches, the women drinking several glasses of beer or wine in a week have the increased risk to develop breast cancer.
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