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Vitamin D

Several recent studies reinforce the evidence of the benefits of vitamin D in the prevention of chronic diseases such as diabetes, musculoskeletal disorders, bone disorders. But that does not mean that these vitamins should be consumed in excess.

A study by Johns Hopkins University shows excessive consumption of this vitamin will not provide any benefit to the body, it can even be dangerous.

The study, published in the American Journal of Medicine recommends you do not need to take supplements of vitamin D. In the right dose, vitamin E protects the heart and blood vessels. But if the excess can increase the risk of cardiovascular disorders.

According to the Chairman of the Study Muhammad Amer, an assistant professor of medicine at Johns Hopkins University School of Medicine, healthy people have to stop consumption of vitamin D supplements because it would not be beneficial.

"Excessive consumption of vitamin D does not give any advantage will be really extravagant," said Amer.

However, most Amer, there are certain groups of people who need extra doses of vitamin D, such as the elderly, recently menopausal women and patients with renal disease.

The results concluded on the basis of a review of the medical records of more than 10,000 patients in the National Health and Nutrition Examination Survey (NHANES). The survey was conducted between 2001-2004. Then the data are compared with data obtained from the National Death Index in 2006.

The results showed that the blood levels of vitamin D 25 is 21 nanograms per milliliter. Levels considered adequate.

If the level is normal, vitamin D in the blood provide benefits that reduce the risk of death from cardiovascular disease by half. Levels above 21 nanograms, this protective effect would probably be small, and even become dangerous.

The main source of vitamin D is sunlight and fortified milk. Earlier research showed that adding vitamin D to lacking reduce cardiovascular risk. Otherwise excessive doses associated with increased risk.

Amer said, people should consult a doctor if you are taking supplements of vitamin D.