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NEW ORLEANS (CNN) - Parents, your kids could be eating a lot more salt than you think, according to a study presented at the American Heart Association conference in New Orleans.

The study's lead author says they looked at more than 1,100 prepackaged snacks or meals targeted to toddlers and babies.

She says more than 75-percent of the toddler meals, typically microwaveable items like macaroni and cheese or pizza, had more sodium than recommended. Some had up to 630 milligrams.

The USDA doesn't want toddlers to have more than 1,500 milligrams of sodium a day.

Researchers say the findings are alarming since there's evidence a child's salt intake is related to the likelihood of developing hypertension later in life.