肥胖会降低人体维生素D含量
[color=#000][font=tahoma, Helvetica, arial][size=14px][b]Obesity can lower vitamin D levels in the body, a study suggests. [/b][/size][/font][/color][color=#000][font=tahoma, Helvetica, arial][size=14px][b]研究显示，肥胖会降低体内维生素D含量。[/b][/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]The report, in the journal PLOS Medicine, analysed genetic data from 21 studies - a total of 42,000 people.[/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]It found every 10% rise in body mass index (BMI) - used as an indicator of body [url=http://www.enread.com/science/91825.html]fat[/url] - led to a 4% drop of available vitamin D in the body.[/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]As vitamin D is stored in fatty tissue, the authors suggest the larger storage capacity in obese people may prevent it from circulating in the bloodstream. [/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]BMI it is calculated by taking weight (in kilograms) and dividing it by height (in metres) squared. Those with a BMI of 30 or above are considered obese. [/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]Lead author Dr Elina Hypponen, from the University College London Institute of Child Health, said the study "highlights the importance of monitoring and treating vitamin D deficiency in people who are overweight or obese". [/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]Vitamin D is made in the skin after sun exposure and can be taken in dietary supplements. [/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]Healthy levels are about 50 nanomole per litre - less than 30 nanomole per litre can cause the softening and weakening of bones, leading to [b]rickets（佝偻病）[/b] in children and[b] osteomalacia（软骨病）[/b] in adults.[/size][/font][/color]
[color=#000][font=tahoma, Helvetica, arial][size=14px]Prof David Haslam, from the National Obesity Forum, said: "Food intake and genetics all play a part in obesity - but this research is a reminder that physical activity, like walking the dog or going for a run out in the sunshine, shouldn't be forgotten and can help correct both weight and lack of [url=http://www.enread.com/science/91825.html]vitamin[/url] D."[/size][/font][/color]
[font=tahoma, helvetica, arial]更多[/font][b][size=24px][url=http://www.enread.com/news/index.html]英语新闻[/url][/size][/b] Obesity can lower vitamin D levels in the body, a study suggests{:6_173:} 我也想胖点
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