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B. Why Those with Hypertension Should Know Their Salts

Narrator: This is Science Today. It's estimated that nine out of ten older Americans suffer from hypertension and even though medications can help, more exercise and better diets can prevent the problem from even starting. While watching salt content is highly recommended, a University of California, San Francisco researcher says there are "good" salts and "bad" salts. Dr. Curtis Morris found in a rat study that potassium salts in fruits and vegetables lowered blood pressure, but the chloride in table salt raised it, indicating it may be the chloride that's the culprit and not the sodium.

Morris: I think it's very possible that there are a number of people who have so-called borderline or high-normal blood pressures in whom hypertension might be prevented or delayed by increasing dietary intake of potassium and reducing the dietary intake of salt.

Narrator: Morris says the best way to get this source of potassium, or the "good" salt, is to eat more fruits and vegetables - but don't overcook the veggies.

Morris: Prolonged boiling tends to cause a leaching of the potassium out of the vegetables and it goes out into the water.

Narrator: For Science Today, I'm Larissa Branin.