Feb 6, 2013 1:47 PM by NBC News
People who are obese may not have enough Vitamin D in their system.
British researchers combined data from more than 20 studies and found for every 10% increase in BMI, Vitamin D levels went down 4%.
They say the vitamin is stored in fatty tissue, and if there's an excessive amount of fat, it could prevent the vitamin from circulating in the bloodstream.
Vitamin D deficiencies can cause bones to soften and weaken.
Vitamin D is made after exposure to the sun. Experts say simple activities like walking the dog or going for a stroll in the park could boost levels of the vitamin and help people lose weight.
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