Low-Sodium Diet: How to Cut Salt for Better Blood Pressure

If your doctor has told you to "cut back on salt," you already know how vague that advice can feel. Salt is everywhere, it makes food taste good, and the foods highest in sodium often don't taste salty at all. The good news: a low-sodium diet is one of the most studied, most effective dietary changes you can make for your blood pressure and heart health, and it doesn't have to mean bland, joyless meals. Here's how to do it in a way that actually sticks.

Why sodium matters

Sodium is an essential mineral. Your body uses it to balance fluids, transmit nerve signals, and contract muscles. The problem is quantity. When you take in more sodium than your body needs, it holds onto extra water to dilute it, which raises the volume of blood in your vessels and, over time, your blood pressure. High blood pressure (hypertension) is a leading risk factor for heart attack, stroke, heart failure, and kidney disease, and it usually has no symptoms until damage is already underway.

For most healthy adults, the recommended ceiling is no more than 2,300 mg of sodium a day, roughly a teaspoon of table salt. For people managing high blood pressure, organizations like the American Heart Association suggest aiming lower, ideally toward 1,500 mg a day, where the blood-pressure benefits are strongest. Many people currently eat well above 3,000 mg, so even moving toward 2,300 mg is meaningful progress.

Where the sodium actually hides

This is the single most important thing to understand: most of the sodium in the average diet does not come from the salt shaker. More than 70 percent comes from packaged, processed, and restaurant foods, sodium that's already in the product before it reaches your plate.

Some of it is obvious, like chips, pretzels, and salted nuts. Much of it is not. Major hidden sources include canned soups and stews, pasta and pizza sauces, gravies, soy and Worcestershire sauce, deli meats, sausage, bacon, cured and smoked foods, cheese, salad dressings, condiments like ketchup, and "seasoned" rice and pasta mixes. Surprisingly, breads, rolls, cereals, and even some pastries contribute a lot, not because any single slice is salty, but because we eat so much of them. A food doesn't have to taste salty to be loaded with sodium, which is exactly why reading labels beats relying on your tongue.

How to read a label for sodium

The Nutrition Facts label is your best tool. Two numbers matter most.

First, milligrams of sodium per serving, checked against the serving size. A can of soup may list 600 mg per serving but contain two servings, so the whole can is 1,200 mg. Second, the % Daily Value (%DV) for sodium, which is based on the 2,300 mg ceiling. A quick rule of thumb: 5% DV or less per serving is low, and 20% DV or more is high. Aim for foods on the lower end and balance the occasional higher-sodium item across your day.

Marketing language is worth decoding too, because it's regulated. "Sodium-free" means less than 5 mg per serving. "Very low sodium" means 35 mg or less. "Low sodium" means 140 mg or less per serving. "Reduced sodium" only means 25 percent less than the original version, so a reduced-sodium soy sauce can still be very high in absolute terms. Read the actual number, not just the claim on the front.

Building flavor without the salt

The fear behind a low-sodium diet is that food will taste like cardboard. It won't, if you replace salt with other flavor tools. Acid is your best friend: a squeeze of lemon or lime, a splash of vinegar, or fresh citrus zest makes food taste brighter and more seasoned. Aromatics like garlic, onion, ginger, and shallots add depth. Fresh and dried herbs, black pepper, smoked paprika, cumin, and chili build complexity. Roasting and searing vegetables and proteins develops savory, caramelized flavor that needs very little salt to shine.

A few practical swaps go a long way:

• Buy fresh or plain frozen vegetables instead of canned; if you do use canned beans, vegetables, or tuna, drain and rinse them to wash away a good portion of the sodium.
• Choose fresh meat, poultry, and seafood over processed, cured, or deli versions.
• Cook more meals at home, where you control what goes in, and use unsalted or no-salt-added stocks and canned goods.
• Go easy on salt-based condiments, and lean on herbs, citrus, and spice blends labeled salt-free.
• Cut back gradually. Your palate adjusts over a few weeks, and food that once seemed under-seasoned starts tasting just right, while heavily salted food can start to taste overpowering.

The DASH approach

If you want a structured framework, the DASH diet (Dietary Approaches to Stop Hypertension) is the gold standard, and in 2025 it was again ranked among the best diets for heart health and high blood pressure by an expert nutrition panel. DASH isn't only about cutting sodium; it emphasizes the foods that actively help lower blood pressure: plenty of vegetables and fruit, whole grains, beans, nuts, lean proteins like fish and poultry, and low-fat dairy. These foods are naturally rich in potassium, magnesium, calcium, and fiber, nutrients that work alongside lower sodium to bring numbers down. In other words, what you add to your plate matters as much as what you take away.

A low-sodium dinner to start with

Cooking from whole ingredients is the most reliable way to keep sodium low, because nothing arrives pre-salted. A great template is a parchment or foil packet: lay a fillet of fish over vegetables, season with herbs, garlic, and citrus, and let it steam in its own juices. Try these Citrus Herb Salmon Packets with Spinach and Zucchini Ribbons, which lean entirely on lemon, fresh dill, parsley, garlic, and black pepper for flavor, with no added salt, no soy sauce, and no canned ingredients. The salmon also brings heart-friendly omega-3 fats, and the spinach and zucchini add potassium and fiber, making this dish a small, delicious model of the DASH idea in one pan.

Make it sustainable

The biggest mistake with low-sodium eating is treating it as a short-term punishment. The people who succeed make a handful of permanent shifts: they cook more at home, keep citrus and herbs on hand, read labels almost automatically, and pick lower-sodium versions of the staples they buy most. None of those changes is dramatic on its own, but together they can move your daily intake by a thousand milligrams or more, which is the kind of change that shows up at your next blood-pressure check.

If you have high blood pressure, kidney disease, or heart failure, your ideal sodium target may be different, and some conditions and medications interact with sodium and potassium in important ways. Work with your doctor or a registered dietitian to set a number that's right for you, and to make sure any big dietary change fits your overall care.

This article is for general educational purposes only and is not a substitute for professional medical advice. Always consult your physician or a registered dietitian before making significant changes to your diet, especially if you have high blood pressure, heart disease, kidney disease, or any other medical condition.