Consumption of supplements without guidance can bring risks to health
This article was translated by an automatic translation system, and was therefore not reviewed by people.
In the opposite of what has been said about the consumption of vitamin supplements and their potential benefits for sports and health, a recent study revealed that consuming these products can make you lose the beneficial effect of exercise, in particular for the prevention of diabetes.
The research, led by German nutritionist Michael Ristow in partnership with the physician Ronald Kahn of Joslin Diabetes Center in Boston (USA), is the issue of the journal American PNAS (Proceedings of the National Academy of Sciences). The problem is that, until then, what was known was that the physical exercise facilitated the action of insulin in the body, helping to prevent diabetes. However, the study showed signs of improvement in insulin metabolism were almost reversed in people who consumed the vitamin supplements.
The explanation of this phenomenon may be the action of nutrients on the oxygen cell. For researchers, the production of free radicals is what can cause this mysterious phenomenon, since they are chemically unstable forms of oxygen produced by cells during physical exertion. Such as vitamins C and E are antioxidants and fight free radicals, the effect of "mocking" is annulled, as if the body does not feel the benefits of exercise, "explains endocrinologist, nutrition specialist and president of the Brazilian Society for the Study of Aging Wilmar Accursio.
In reaching this result, the researchers looked for four weeks a group of 40 male healthy adults, who followed an exercise program, and only half received supplements of vitamins C and E. Were made of muscle biopsies from volunteers, to examine their metabolism.
Effect - Consulted by Jornal A Tarde, some respondents spoke about the importance of work, but disputed some points that are important to conduct a search that level. "The study is serious, is a randomized, double-blind, controlled, ensuring ultra-reliable, but the sample with the participation of only 40 people, all male and does not take into account the dietary habits and lifestyle of researched, "says sports nutritionist Vanilson Silva.
The nutritionist and obesity expert, Márcia Magalhães, the study also considers important, but states that caution is needed. "I think the study is extremely important and we know that when it comes to nutrition, things change, are not stable, but I think four weeks is little time to say that the consumption of supplements promotes insulin resistance. I believe it would be investigating more people over a longer period. "
Marcia explained that the very act of doing physical activity produces free radicals, they in turn give rise to enzymes that have antioxidant functions (any substance that prevents other substance to be oxidized) and glutathione peroxidase and superoxide dis mutase. They work in the improvement of insulin resistance. "The researchers suggest in their study and needs further investigation is that vitamins C and E inhibit the formation of these enzymes, which causes them to lose the benefits," he explains.
The endocrinologist and Nutrologist Sandra Gordilho calls attention to the fact that the need for being informed on what types of exercise the patients underwent. "By making physical activity produce free radicals and the activity itself can lead to oxidative stress, depending on the intensity and time that is done," he explains.
She said the fact that a person exercising does not mean therefore that it is free to produce the radicals. "Free radicals can be produced by oxygen, food containing pesticides, additives, stress, smoking, alcohol, radiation, pollution etc.. A sedentary person, for example, can produce the same amount of free radicals that a person who exercises for more than an hour. Therefore, there may be other factors that led to this conclusion, other than the use of supplements. You'd have to take this into account, "he explains.
The doctor points out, however, that contrary to what many believe free radicals play an important role in infectious and inflammatory processes. "Some of the white blood cells release enzymes that give rise to free radicals that are important in fighting infections. When oxygen reaches the site of inflammation is oxidized, generating free radicals that promote the destruction of bacteria, "he says, adding that they are important, the problem is on the surplus production that can be prevented with simple changes such as not smoking, eating check antioxidant foods, avoid stress, pollution and alcohol.
A diet rich in xenobiotic can lead to oxidative stress, thus the consumption of many processed foods, high in preservatives and sweeteners, can contribute to free radicals to form. Furthermore, the use of a diet rich in trans fats and saturated fats, as well as the use of refined foods, coupled with the monotonous food may be contributing factors in oxidative stress.
Source: A Tarde Online
This article was translated by an automatic translation system, and was therefore not reviewed by people.
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