Obesity doesn't make you less intelligent, but it might cloud your cognitive abilities.
In a recent study, conducted by researchers at Georgia Regents University, the blood of obese mice had especially high levels of a chemical called interleukin 1, a substance born from fat cells that can cause inflammation. When the researchers later examined the obese mice brains, they found that interleukin 1 had passed the blood-brain barrier--something that normally should not be possible. The substance had seeped into the hippocampus, an area responsible for memory and learning.
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