Consumption of an average of more than 4,100 milligrams of sodium each day was associated with shorter telomeres among overweight and obese 14- to 18-year-olds, according to a study presented at an American Heart Association meeting. However, researchers found that high sodium intake was not linked to increased telomere shortening in normal-weight teens. The findings suggest that "high [salt] intake and obesity may act synergistically to accelerate cellular aging," lead author Dr. Haidong Zhu said.

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