A new study suggests childhood obesity may be linked to a higher risk of multiple sclerosis.

MS is usually diagnosed in adulthood, but Kaiser Permanente researchers say the neurological disease is more common in obese children, especially girls. The study was published in the journal Neurology.

In fact, their data showed girls who were considered extremely obese were three to four times more likely to develop MS as a teenager.

Researchers say this doesn't prove extra weight causes multiple sclerosis , but they believe that rising obesity rates could mean more MS diagnoses in the future.

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