(Friday, 27 May HealthDay News) - older women who are overweight or are obese and lost more than 15% of their body weight may increase significantly their levels of vitamin D, new research suggests.
The study, conducted by researchers at Fred Hutchinson Cancer Research Center, also indicates that the rise in vitamin d could help scientists to explore new avenues for the prevention of chronic diseases like diabetes and cancer.
"Since vitamin d is generally lower in obese persons, it is possible that low vitamin d may explain, in part, for the link between obesity and the diseases such as cancer, cardiovascular disease and diabetes," study author Caitlin Mason, research scientist postdoctoral fellow, said in a press release Hutchinson.
Vitamin d is fat-soluble nutrients that plays many important roles in the body, including promoting the absorption of calcium, reducing inflammation and affecting the health of the cell and the immune system. He found in certain foods, such as fatty fish and produced naturally in the body by exposure to the Sun.
The study, published in the online, on May 25 of the American Journal of Clinical Nutrition assigned 439 women menopausal overweight or obese in one of the four schemas: exercise only, only diet, exercise more diet and no intervention.
Although women who have lost (10 to 20 pounds) up to 10% of their body weight by diet and exercise was relatively modest vitamin D increases, these levels was approximately three times higher among women, which has fallen more than 15% of their body weight, regardless of what they eat.
"We were surprised at the effect of weight loss greater than 15% on blood levels of vitamin D," study author main Dr. Anne McTiernan, Director of the Centre for prevention of the Hutchinson Center, said in the press release. "It seems that the relationship between the loss of weight and blood vitamin d is not linear but increases greatly with weight loss."
McTiernan has concluded that the findings suggest plue loss of weight, the most significant levels of vitamin D boom.
Researchers have noted, however, the extent in which vitamin d is available for the body during and after the loss of weight remains uncertain. They have also warned that more targeted research are needed to understand any link between vitamin d deficiency and chronic diseases.
More information
The National Institutes of Health offers more information about the functions and sources of vitamin d.
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