Heavy news for your smile: Researchers have found an association between being overweight and periodontal disease and conditions of the teeth and mouth. Nothing wrecks a selfie like sore, red, bleeding gums.

The study, published in the journal Oral Diseases, followed 160 subjects and observed oral health along with body mass index (BMI), a measure of body fat based on height and weight . A normal BMI ratio ranges from 18.5 to 24.9, but even subjects with a BMI of 23 were worse off when it came to severe periodontitis, inflammatory dental diseases and infection-fighting leukocyte counts.

The picture was even worse for obese subjects — those whose BMIs were 25: Their risk for severe periodontitis was six times higher than participants who tipped the scale at an average weight.

Inflammatory molecules linked with obesity may be responsible.

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