Find out how much sodium you really need, what
high-sodium foods to avoid, and ways to prepare and serve foods without
adding sodium.
If you're like many people, you're getting far more sodium than is recommended, and that could lead to serious health problems.
You probably aren't even aware of just how much sodium is in your diet.
Consider that a single teaspoon of table salt, which is a combination of
sodium and chloride, has 2,325 milligrams (mg) of sodium. And it's not
just table salt you have to worry about. Many processed and prepared
foods contain sodium.
See how sodium sneaks into your diet and ways you can shake the habit.
Sodium: Essential in small amounts
Your body needs some sodium to function properly because it:
- Helps maintain the right balance of fluids in your body
- Helps transmit nerve impulses
- Influences the contraction and relaxation of muscles
Your kidneys naturally balance the amount of sodium stored in your body
for optimal health. When your body sodium is low, your kidneys
essentially hold on to the sodium. When body sodium is high, your
kidneys excrete the excess in urine.
But if for some reason your kidneys can't eliminate enough sodium, the
sodium starts to build up in your blood. Because sodium attracts and
holds water, your blood volume increases, which makes your heart work
harder and increases pressure in your arteries. Such diseases as
congestive heart failure, cirrhosis and chronic kidney disease can make
it hard for your kidneys to keep sodium levels balanced.
Some people's bodies are more sensitive to the effects of sodium than
are others. If you're sodium sensitive, you retain sodium more easily,
leading to fluid retention and increased blood pressure. If this becomes
chronic, it can lead to heart disease, stroke, kidney disease and
congestive heart failure.
Sodium: How much do you need?
The Dietary Guidelines for Americans recommend limiting sodium to less
than 2,300 mg a day — or 1,500 mg if you're age 51 or older, or if you
are black, or if you have high blood pressure, diabetes or chronic
kidney disease.
Keep in mind that these are upper limits, and less is usually best,
especially if you're sensitive to the effects of sodium. If you aren't
sure how much sodium your diet should include, talk to your doctor or
dietitian.
Sodium: What are the major dietary sources?
The average American gets about 3,400 mg of sodium a day — much more
than recommended. Here are the main sources of sodium in a typical diet:
- Processed and prepared foods. The vast majority of
sodium in the typical American diet comes from foods that are processed
and prepared. These foods are typically high in salt and additives that
contain sodium. Processed foods include bread, prepared dinners like
pasta, meat and egg dishes, pizza, cold cuts and bacon, cheese, soups,
and fast foods.
- Natural sources. Some foods naturally contain
sodium. These include all vegetables and dairy products, meat, and
shellfish. While they don't have an abundance of sodium, eating these
foods does add to your overall body sodium content. For example, 1 cup
(237 milliliters) of low-fat milk has about 100 mg of sodium.
- In the kitchen and at the table. Many recipes call
for salt, and many people also salt their food at the table. Condiments
also may contain sodium. One tablespoon (15 milliliters) of soy sauce,
for example, has about 1,000 mg of sodium.