Low-Salt Diet

One of the ways to manage high blood pressure is by following a low-salt (also called low-sodium) diet.

What is sodium?

Sodium is a mineral that is necessary for our hydration status and to generally maintain good health. Though when eaten in excess, it can be harmful, especially to those with high blood pressure. Almost all fresh foods have small amounts of naturally occurring sodium. In contrast, processed foods are typically much higher in sodium – even if they don’t taste salty – because salt is often added during the processing and preparation of foods. In fact, processed foods typically make up to 75% of our sodium intake! Pizza, deli meats, soups, snack foods (chips, pretzels, and crackers), cheeses, sauces, flavored rice or pasta, and breads are some of the foods highest in sodium.

How much dietary sodium is recommended?

Chronic Disease Risk Reduction levels recommend limiting your total sodium intake to 1800-2300 milligrams (mg) per day depending on age, with a stricter recommendation of 1500 mg for those with hypertension (aka high blood pressure). One major concern with eating too much sodium is that it can cause your body to hold onto water and increase your blood pressure. This makes your heart work harder and can harm your blood vessels, leading to hypertension and other heart problems such as stroke. If you are at risk for either of these conditions, it is recommended to limit sodium intake to 1500 mg per day. A typical teen has almost twice this much sodium, so it may be necessary to cut back gradually in order to follow a low sodium diet.

What foods should I eat?

Eating more whole, fresh, unprocessed foods and fewer processed foods will help you eat less salt. These tend to be foods that do not come in a package or have very few ingredients such as fresh fruits and vegetables, plain whole grains, unsalted nuts, meats, and beans. Reading the Nutrition Facts Label on the foods you eat can also help you figure out which foods have less sodium. Look for the milligrams of sodium listed on the label. Compare the sodium content of different products to find the one that is the lowest. Also, look for foods that advertise that they are “low-sodium”, “reduced-sodium”, “salt/sodium-free”, or “no salt added.” A food that is labeled “low sodium” will have 140 mg or less per serving and a “salt/sodium-free” food will have less than 5 mg.

If I don’t have high blood pressure, do I need to be concerned with how much sodium I consume?

While healthy teens do not need to strictly watch their sodium intake, decreasing the amount of sodium in your diet can help prevent high blood pressure and cardiovascular disease in the future.

Here are some tips for lowering your salt intake:

• Leave the salt shaker in the cabinet. Try not to add salt to your food, or at least cut down on the amount of extra salt you use. Use pepper, onions, garlic, herbs, and spices, or try fresh lemon or lime to flavor your food.
• Limit your condiments. Condiments such as mustard, ketchup, BBQ sauce, soy sauce, and teriyaki sauce are usually very high in sodium. Be mindful when having these and choose low-salt or reduced-salt versions when available.
• Avoid cured and high-salt meats such as bacon, sausage, bologna, pepperoni and ham. Limit deli meats and cheeses. Instead, try using fresh or frozen poultry like chicken or turkey, or choose low-salt versions of deli meats.
• Limit the amount of pre-packaged and processed foods you eat, such as frozen meals, macaroni and cheese, pizza rolls, ramen noodles, and chicken nuggets. These types of foods tend to be high in sodium. Check out the Nutrition Facts Label and choose the options that are lower in sodium.
• Stay away from pickled foods and those packaged in brine (salt water) such as olives and pickles.
• Choose fresh or frozen vegetables and beans instead of canned. If you like canned vegetables or beans, pick cans labeled “low-salt” or “no-salt added”. Draining and rinsing canned vegetables and beans can also cut sodium by up to 40%.
• Limit snack foods that are high in salt. Look for “reduced-salt” or “low-salt” chips, popcorn, pretzels, and crackers. Try unsalted nuts and peanuts. Instead of French fries, ask for a side salad or fruit.
• Stay away from canned soup. Canned soups are super high in sodium. Many soups and broths contain a whopping 600-950 mg of sodium per serving (or more!). Read the nutrition food label and look for “reduced sodium” or “low sodium” varieties, which usually contain half the amount of sodium (200-400mg per serving). Remember, if a can of soup contains two servings and you plan to eat the whole can, you need to multiply the sodium per serving by two.

If I have high blood pressure, aside from following a low-salt diet, is there anything else I can do to manage my blood pressure?

Eating an overall healthy diet that is low in salt and high in fruits, vegetables, dairy, whole grains, and lean proteins will help manage your blood pressure. Doing regular exercise is also an important part of managing your blood pressure. Stress can also increase your blood pressure so taking deep breaths or using other stress-reduction activities can be helpful.

Can I still eat fast food?

Once in a while, it’s okay to eat fast food, but remember it tends to be very high in salt, so try not to eat it too often. When ordering at fast food restaurants, choose salads or foods that are grilled, broiled, or steamed rather than fried, cured or smoked. Limit high-salt toppings such as ketchup, mustard, BBQ sauce, hot sauce, and pickles. Ask for your dish to be prepared without extra salt. You can also look up the nutrition facts on almost all fast food menu items online. Check out the menu ahead of time so you know which options have a lower amount of salt.

Our health guides are developed through a systematic, rigorous process to ensure accuracy, reliability, and trustworthiness. Written and reviewed by experienced healthcare clinicians from Boston Children's Hospital, a Harvard Medical School teaching hospital and consistently ranked as a top hospital by Newsweek and U.S. News & World Report, these guides combine clinical expertise, specialized knowledge, and evidence-based medicine. We also incorporate research and best practices from authoritative sources such as the CDC, NIH, PubMed, top medical journals, and UpToDate.com. Clinical specialists and subject matter experts review and edit each guide, reinforcing our commitment to high-quality, factual, scientifically accurate health information for young people.