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New study finds high salt intake in overweight teens accelerates cellular aging

March 21, 2014 By Contributor

New study finds high salt intake in overweight teens accelerates cellular aging

Salt intake may accelerate cellular aging, according to a new study.

High salt intake in teens who are already obese may make their cells age faster, a study has found. Cellular changes were noted in teens ages 14 to 18 years old.

The study results were presented at the American Heart Association’s Epidemiology & Prevention/Nutrition, Physical Activity & Metabolic Scientific Sessions 2014. Researchers noted that they found that overweight and obese teenagers who ate too much salt showed signs of faster cell aging.

The researchers divided the 766 participants into two groups, based on whether they consumed over 4,100 mg of salt per day, or under 2,400 mg of salt a day. Participants in both groups consumed well over the American Heart Association’s recommended daily salt serving of 1,500 mg.

Study lead author Haidong Zhu, assistant professor of pediatrics at the Medical College of Georgia, Georgia Regents University in Augusta, Georgia, said, “Even in these relatively healthy young people, we can already see the effect of high sodium intake, suggesting that high sodium intake and obesity may act synergistically to accelerate cellular aging.”

Researchers discovered that protective ends of a chromosome called telomeres, which typically shorten with age, appeared to be significantly shorter in overweight and obese participants with a high salt intake, but not in teens of a normal weight with a high salt intake.

Zhu explained that overweight teens who would like to reduce their risk of heart disease should think about reducing their salt intake, which may be easier than trying to lose weight.

According to Zhu, “Lowering sodium intake, especially if you are overweight or obese, may slow down the cellular aging process that plays an important role in the development of heart disease.” He continued, “Lowering sodium intake may be an easier first step than losing weight for overweight young people who want to reduce the risk of heart disease.”

Zhu noted that a lot of salt comes from processed foods, and urged parents to prepare fresh, healthy foods more frequently.

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