Thursday, December 22, 2011

Vitamin D prevents fractures, but its role in the fight against cancer is not clear

Vitamin D prevents fractures, but its role in the fight against cancer is not clear
New analysis shows that taking vitamin D, along with calcium supplements, it is possible to reduce the risk of broken bones, but there is not enough evidence to say that it is possible to reduce the risk of cancer.
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The study showed that people who take vitamin D supplements Alcaalseyoum exposed to bone fractures by less than 11 percent of people who do not take dietary supplements.


A study of Chung Mei and Hualbages in epidemiology and nutrition assistant director of evidence-based practice in the center of Tufts Medical Center in the elderly living in institutions, and taking vitamin D, there was a significant decrease in the proportion of fractures by about 30 percent.


Chung said that the analysis requested by the Task Force for Preventive Services of America, the only study to produce a draft of vitamin D, set to be issued in the month of January.


By examining the studies on the role of vitamins for the prevention of cancer, said Chong, "We do not have the information good enough", and other factors such as the amount of vitamin D, which dealt with individuals in their diets, the amount of sun exposure because this is not controlled in previous studies that have been review and analysis ..


Vitamin D in the body

 
Vitamin (d) a little of the foods, although some foods fortified with vitamin D, according to the National Institutes of Health. Showed that the salmon, tuna and egg yolks and fish are good sources. And synthesis of UV radiation by the skin at the completion of the exposure to the sun.


Chung said research has shown that vitamin D participates with the deposit of minerals in the bones, but its potential role in cancer is less clear. She said that some research says that vitamin D is likely to have a role in promoting cell division and other processes that may lead to cancer, and said that some studies say that it is possible to have the opposite effect. Effect of vitamins on various parts of the body some of them encourage some types of cancer, development, and others to prevent its occurrence.


Chung analyzed 19 studies of the effects of vitamin D on bone fractures, and 28 study showing its effect on cancer.


Study in terms of reduction of fractures, that vitamin D reduces the risk only if taken with calcium. According to a study showing that taking 300 IU of vitamin D with 1100 IU of calcium per day be useful.


Chung said that studies conflict in their findings about whether vitamin D prevents cancer. Three of the studies random - which is the strongest kind of scientific evidence in which participants divided into two groups at the beginning of the study and asked to take vitamin D or placebo, suggested that studies have shown that taking high doses of vitamin D ((1000 IU per day) reduces the cancer.


Chung said, however, not measured levels of vitamin D in the blood of the participants in the study, and without these measurements can not be done to reach conclusions. Some people in the group taking placebo had taken supplements of vitamin D, and perhaps as part of the vitamins, and participants in the study can be very different levels of vitamin D in their diets, and their exposure to the sun.


Analyzed Zhong some studies and possibilities for researchers who have measured Mistoaatveetamen (d) in the blood, has been tracking these levels with the cancer cases, it was suggested that people beggars high rates have a lower risk for cancer of the colon and rectum, but the data on breast and prostate cancer have been mixed, showing that high levels of vitamin D, further reducing the risk of any type of cancer. She said it can not be the general conclusion about the risks of cancer and vitamin D.


Chung said to determine the better results that vitamin D reduces the risk of cancer, what is required measure the levels of vitamin D FP blood and find out the diet and dietary supplements.


She noted that taking calcium with vitamin D for a long period is associated with an increased risk for kidney stones.


Chung said that the receptors in the body in our blood to take active form of vitamin D, which is known to affect many of the cells. She said a better understanding of the role of the vitamin in all body processes will be useful in assessing the potential of the vitamin in the prevention of diseases.

Health

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