Is 1,500 mg of sodium a day safe for everyone?

The 2025 AHA/ACC guideline names under 1,500 mg as the ideal limit for adults with high blood pressure. It is a target, not a floor everyone must hit. People with kidney disease, heart failure, or certain medications need an individual number from their clinician.

Does sea salt or pink Himalayan salt have less sodium than table salt?

By weight the sodium content is essentially the same, because all of these are sodium chloride. Sodium is about 40% of salt by weight regardless of the crystal size or color. Coarser crystals mean fewer grains fit in a teaspoon, so the measure can look smaller, but the milligrams per gram do not change.

How fast does blood pressure respond after I cut sodium?

In feeding trials like DASH-Sodium, each sodium level was eaten for about a month before blood pressure was measured. A few weeks is a reasonable window to judge a change. Take home readings across that whole span rather than relying on one measurement.

Can I drink more water to flush out extra sodium?

Drinking water does not cancel a high sodium intake. Your kidneys excrete sodium over time, and the blood pressure effect tracks how much sodium you eat, not how much water you drink with it. Lowering the intake is the part that changes the number.

Are salt substitutes a good shortcut?

Potassium-enriched salt substitutes lowered systolic pressure by 3.3 mmHg in the SSaSS trial of nearly 21,000 adults. The 2025 AHA/ACC guideline says to consider them, but not in chronic kidney disease or with drugs that reduce potassium excretion. Confirm with your clinician before switching.

How Much Sodium Is Actually In A Low-Sodium Diet?

The short answer: In the United States, a low-sodium diet means less than 2,300 mg of sodium a day. That is the Daily Value on the Nutrition Facts label and the limit set by the 2025-2030 Dietary Guidelines for Americans. The 2025 AHA/ACC high blood pressure guideline keeps 2,300 mg as the goal and names 1,500 mg as the ideal. The World Health Organization sets a stricter bar of 2,000 mg. Most Americans eat about 3,400 mg.

What sodium number do the guidelines actually name?

Four bodies publish a sodium figure, and they do not all match. Here is what each one says.

Dietary Guidelines for Americans (2025-2030): less than 2,300 mg a day for people age 14 and older, per the published review of the new edition and the CDC sodium page.
FDA: the Daily Value used on every Nutrition Facts label is less than 2,300 mg per day.
2025 AHA/ACC high blood pressure guideline: the optimal goal is under 2,300 mg, with an ideal limit of under 1,500 mg per day. It carries the strongest rating the guideline gives, Class 1 with Level A evidence.
WHO: less than 2,000 mg of sodium a day for adults.

So "low sodium" is really a band from 1,500 to 2,300 mg. The gap between the guidelines and reality is large. Americans average about 3,400 mg a day, roughly 50% above the 2,300 mg limit, according to the FDA. If your numbers sit in the range covered in is blood pressure 130/80 a problem, the 1,500 mg target is the one your clinician is likely to raise.

Is sodium the same thing as salt?

No, and the difference changes the arithmetic. Table salt is sodium chloride. Sodium makes up about 40% of salt by weight. WHO states the conversion plainly: 1 gram of salt contains 400 mg of sodium, so 5 grams of salt contains 2,000 mg of sodium.

US Nutrition Facts labels list sodium in milligrams, not salt in grams. Many European labels list salt in grams instead. To convert salt grams to sodium milligrams, multiply by 400. The 2,300 mg US limit works out to about 5.75 grams of salt.

The global picture is worse than the US one. WHO reports a mean adult intake of 4,278 mg of sodium a day in 2021, which is about 11 grams of salt, more than double its recommendation.

How much sodium is in a teaspoon of salt?

About 2,300 to 2,400 mg. The FDA describes the 2,300 mg limit as roughly one teaspoon of table salt. The CDC puts a teaspoon at approximately 2,400 mg of sodium.

That single teaspoon is the entire daily allowance. The 1,500 mg ideal is closer to two thirds of a teaspoon. Picture that volume next to a day of normal eating and the problem becomes obvious. You cannot get to 2,300 mg by portioning the salt shaker, because the shaker is not where most of your sodium comes from.

Where does the sodium in the US diet come from?

Over 70% of dietary sodium comes from packaged and prepared foods, not from salt added at the stove or table, per the FDA. Salt added during cooking and at the table is a minority share.

The FDA, citing CDC data, reports that about 40% of US sodium intake comes from just ten food types:

Deli meat sandwiches
Pizza
Burritos and tacos
Soups
Savory snacks such as chips, crackers, and popcorn
Poultry and chicken products
Pasta mixed dishes
Burgers
Egg dishes and omelets

This is why the FDA is pushing the food supply itself lower. Its voluntary sodium reduction targets set Phase I goals in 2021 and issued draft Phase II targets on August 15, 2024, covering 163 food categories. If industry meets Phase II, average intake would fall to about 2,750 mg a day. That is a roughly 20% cut, and still above 2,300 mg.

How do you read the sodium %DV on a label?

The %DV column tells you what share of 2,300 mg one serving delivers. The FDA gives two quick rules: 5% DV or less per serving is low in sodium, and 20% DV or more per serving is high. A frozen entree at 40% DV uses 920 mg, nearly half a day.

Front-of-package claims are regulated and mean specific milligram amounts per serving:

Salt or 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: at least 25% less than the regular product
Light in sodium or lightly salted: at least 50% less than the regular product
No salt added or unsalted: no salt added during processing, which is not the same as sodium free

Two traps hide here. "Reduced sodium" is relative, so 25% off a very salty product can still be high. And every threshold is per serving, so check servings per container before you multiply. If you track intake day to day, a food log such as calories.md makes the running milligram total visible.

How much does cutting sodium actually lower blood pressure?

The DASH-Sodium trial fed three sodium levels and measured 24-hour urine output at 143, 107, and 66 mmol per day, which is roughly 3,300, 2,500, and 1,500 mg. On the control diet, systolic pressure fell 2.1 mmHg going from the high to the intermediate level, and another 4.6 mmHg going from intermediate to low. Combining the low sodium level with the DASH eating pattern lowered systolic pressure 7.1 mmHg in people without hypertension and 11.5 mmHg in people with it.

The 2025 AHA/ACC guideline summarizes the expected effect as about 6 to 8 mmHg of systolic lowering in people with hypertension. Two other trials add long-term context.

TOHP: counseling cut sodium excretion by a net 44 mmol per 24 hours in TOHP I and 33 mmol in TOHP II, roughly 1,000 mg and 760 mg. At 10 to 15 years of follow-up, cardiovascular event risk was 25% lower in the intervention group.
SSaSS: in 20,995 rural Chinese adults, a potassium-enriched salt substitute cut 24-hour urinary sodium by 15.2 mmol and lowered systolic pressure by 3.3 mmHg versus regular salt.

The 2025 guideline suggests considering a potassium-based salt substitute, but not for people with chronic kidney disease or those on drugs that reduce potassium excretion. Ask your clinician first. To see whether your own cut is working, take readings at home over several weeks, as described in home blood pressure monitoring.

The bottom line

A low-sodium diet in the US means under 2,300 mg a day, and under 1,500 mg if you have high blood pressure. That is one teaspoon of salt, or two thirds of one. Since over 70% of your sodium arrives inside packaged and restaurant food, the useful skill is label reading, not shaker discipline. Use the 5% and 20% DV rules, watch servings per container, and expect a few millimeters of mercury, not a cure, from the change.

Last updated: September 2026. This article is for informational purposes only and does not constitute medical advice. Talk to your clinician before making large changes to your sodium or potassium intake, especially if you have kidney disease, heart failure, or take blood pressure or diuretic medication.