Q. I have high blood pressure and I'm trying to cut down on the sodium in my diet. Should I switch from regular table salt to sea salt?

Sea salt is made from evaporating sea water. Table salt comes from underground mines.

Sea salt sounds healthier doesn't it? It evokes images of crashing surf, tanned bodies, and marlin jumping out of the water.

Sea salt and table salt contain the same amount of sodium chloride. Switching won't help you with your high blood pressure. But you're on the right track.

The U.S. Department of Agriculture advises people with high blood pressure to reduce their daily sodium intake to 1,500 mg per day.

The recommendation for adults who do not have high blood pressure is 2,300 mg per day, which is about the amount of sodium in a teaspoon of table salt.

However, the American Heart Association says the daily intake of sodium should be limited to less than 1,500 mg a day for adults.

About nine out of 10 Americans consume too much sodium. Americans on average consume 3,436 mg sodium daily.

High-sodium diets are linked to increased blood pressure and a greater risk for heart disease and stroke. Reducing the amount of sodium you consume can help lower blood pressure or prevent it from developing. Less sodium also makes blood-pressure medications more efficient.

Table salt (sodium chloride) is not the only problem. The main sources of sodium in the average U.S. diet are:

5 percent added while cooking;

6 percent added while eating;

12 percent from natural sources; and

77 percent from processed foods.

Focusing on prepared and packaged foods is the most effective way to cut down on sodium. When you buy these foods, read the "Nutritional Facts" panel for the amount of sodium. Some products also include sodium terms.

Here's what these terms mean:

Sodium-free: less than 5 mg per serving;

Very low-sodium: 35 mg or less per serving;

Low-sodium: 140 mg or less per serving;

Reduced sodium: 25 percent less sodium than usual;

Lite or light in sodium: 50 percent less sodium than the regular version; and

Unsalted, no salt added or without added salt: contains only the sodium that's a natural part of the food.

Most of the body's sodium is in blood and other fluids. Sodium helps keep fluids in a normal balance and helps maintain normal nerve and muscle function.

The body gets sodium through eating and drinking, and loses it by sweating and urinating. Healthy kidneys maintain a consistent level of sodium in the body by adjusting the amount excreted in the urine.

Seniors have to be especially careful about sodium consumption because their bodies can't handle it as well as they did when they were younger. Here are some reasons:

Kidneys may not work as well as they did.

As we age, we are not as sensitive to thirst and may not drink fluids when we need them.

About 45 percent of body weight is fluid in healthy older people, compared with 60 percent in younger people. Even a slight loss of fluid and sodium in a senior can cause health problems.

Some older people have physical problems that prevent them from getting something to drink.

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