(Wednesday, may 4, HealthDay News) - low levels of vitamin d are frequent in obese adolescents, a new study finds.
Researchers projected 68 obese adolescents and found levels low vitamin d in all the girls (72% have found deficient and 28 per cent insufficient) and 91% of boys (69 per cent defective and inadequate of 22 per cent).
After treatment, 43 young people had their levels of vitamin d measured again and, although levels generally increased, normal levels were achieved in only 28% of the participants. In others, repeated episodes of treatment of vitamin d did not levels of vitamin d to adolescents, to normal that researchers have described as "about".
Lack of teenagers of the response to treatment may be due to the fact that vitamin d is trapped in the body fat, researchers said.
"The prevalence of the status of low vitamin d in obese adolescents in this study is higher than previously reported for this age group," Dr. Zeev Harel, a pediatrician specializing in medicine teenager from Providence Hasbro children's HospitalR.I. and lead author of the study, said in a press release from the hospital.
The study was published in May the issue of the Journal of adolescent health.
Vitamin d is produced by the skin in response to exposure to the Sun. It also found in certain foods, including eggs, fish and fortified foods, such as dairy products and cereals for breakfast.
"It is possible that the association between obesity and the low of vitamin d is indirect, arising from obese persons with activities outdoors less than lean individuals and, therefore, less exposure to the Sun," wrote the researchers. "In the same way, it is also possible that obese individuals do not sufficiently consume foods that contain vitamin d.".
They have called for closer monitoring of the levels of vitamin d in obese adolescents and for further research to determine if restore the normal rate of vitamin d may help to reduce the health risks associated with obesity.
Obesity - now estimated to affect 16.4% in children and adolescents between 10 and 17 - can increase the risk of high blood pressure, heart disease and type 2 diabetes, and certain types of cancer, the researchers noted.
More information
The U.S. Office of Dietary Supplements has more vitamin d.
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