Sodium

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 sodium levels are low, your kidneys essentially hold on to the sodium. When sodium levels are high, your kidneys excrete the excess in urine.
But if for some reason your kidneys can't eliminate enough sodium, the sodium starts to accumulate in your blood. Because sodium attracts and holds water, your blood volume increases. Increased blood volume makes your heart work harder to move more blood through your blood vessels, which 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.

The 2010 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.


The average American gets about 3,400 mg of sodium a day — much more than recommended. To help keep your sodium consumption in check, you need to know where the sodium comes from.

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, which is a combination of sodium and chloride, and in 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 such as milk, meat and shellfish. While they don't have an abundance of sodium, eating these foods does add to your overall sodium intake. For example, 1 cup (237 milliliters) of low-fat milk has about 107 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 may also contain sodium. One tablespoon (15 milliliters) of soy sauce, for example, has about 1,000 mg of sodium.

Virtually all Americans can benefit from reducing the sodium in their diet. Here are more ways you can cut back on sodium:

• Eat more fresh foods. Most fresh fruits and vegetables are naturally low in sodium. Also, fresh meat is lower in sodium than are luncheon meat, bacon, hot dogs, sausage and ham. Buy fresh and frozen poultry or meat that hasn't been injected with a sodium-containing solution. Look on the label or ask your butcher. Buy plain whole-grain rice and pasta instead of ones that have added seasonings. Make your own soups from scratch.
• Opt for low-sodium products. If you do buy processed foods, choose those that are labeled "low sodium."
• Remove salt from recipes whenever possible. You can leave out the salt in many recipes, including casseroles, stews and other main dishes that you cook. Baked goods are generally an exception since leaving out the salt could affect the quality and taste. Use cookbooks that focus on lowering risks of high blood pressure and heart disease to help guide you to sparing the salt without spoiling taste or quality.
• Limit use of sodium-laden condiments. Soy sauce, salad dressings, sauces, dips, ketchup, mustard and relish all contain sodium.
• Use herbs, spices and other flavorings to enhance foods. Use fresh or dried herbs, spices, zest from citrus fruit, and fruit juices to jazz up your meals. And remember that sea salt has about the same amount of sodium as table salt.
• Use salt substitutes wisely. Some salt substitutes or light salts contain a mixture of table salt and other compounds. To achieve that familiar salty taste, you may use too much of the substitute — and get too much sodium. Also, many salt substitutes contain potassium chloride. Although potassium can lessen some of the problems from excess sodium, too much potassium can be harmful if you have kidney problems or if you're taking medications for congestive heart failure or high blood pressure that cause potassium retention.

Sodium: Cut back gradually
Your taste for salt is acquired, so you can learn to enjoy less. Decrease your use of salt gradually and your taste buds will adjust. After a few weeks of cutting back on salt, you probably won't miss it, and some foods may even taste too salty. Start by using no more than 1/4 teaspoon of salt daily — at the table and in cooking. Then throw away the salt shaker. As you use less salt, your preference for it diminishes, allowing you to enjoy the taste of the food itself, with heart-healthy benefits.