Advice on salt, hidden in an array of foods, gets specific

Advice on salt, hidden in an array of foods, gets specific
In this Sept. 26, 2018 file photo, a worker adds cheese to a raw pizza at a shop in Pittsburgh. A report released Tuesday, March 5, 2019 by the National Academies of Science ties the recommended limit on sodium to a reduced risk of chronic disease. Sodium can be hidden in bread, pizza, soup and an array of other foods. (Stephanie Strasburg/Pittsburgh Post-Gazette via AP)

It can be hidden in bread, pizza, soup and other packaged foods and restaurant meals. Now, advice to watch out for salt is coming with a more specific reason.

A report released Tuesday by the National Academies of Science ties the recommended limit on sodium to a reduced risk of chronic disease. The report, which is expected to serve as a guide for policymakers, says the updated guidance is meant to convey that cutting back on salt can reduce risk of cardiovascular disease, even if people are still above the recommended limit of 2,300 mg a day for most adults.

Previously, the recommended limit was based on an "upper intake level," a threshold experts use to indicate a variety of potential bad effects. Now, the report says the upper intake level will indicate the threshold for potential toxicity, or when a nutrient causes an immediate harm. It says there's not enough evidence to set such a threshold for sodium.

It's the first dietary intake recommendation tied to a reduced risk of chronic disease, according to the report, but other nutrients may be similarly re-evaluated. Otherwise, the report mostly reinforces existing recommendations, with some tweaks. For example, it said there's no longer enough evidence that people who are 51 and older need less salt than other adults.

Advice on potassium, which is found in foods including bananas and potatoes, was also adjusted to generally lower the amounts considered adequate for healthy individuals.

The report was sponsored by federal agencies including the U.S. Department of Health, which oversees the government's dietary guidelines.

More information: NAS press release

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