Reducing sodium is an established part of blood pressure management. But putting that advice into practice can be confusing: food labels may list sodium in milligrams, recipes use salt, and serving sizes vary.
The first step is understanding what you are counting.
This guide explains the difference between salt and sodium, how common recommendations compare, and ways to review your usual foods without making every meal a calculation.
How Does Salt Affect Blood Pressure?
High sodium intake raises blood pressure, and reducing it helps lower blood pressure and cardiovascular risk. The size of the response varies between people.
Sodium reduction belongs within your overall care plan. Continue prescribed treatment and review your readings with your healthcare professional.
For a broader food approach, read the DASH diet for blood pressure.
Salt and Sodium Are Different Measurements
Ordinary table salt is sodium chloride. Sodium accounts for approximately 40% of its weight.
A useful approximate conversion is:
1 gram of salt contains 400 milligrams of sodium.
| Sodium | Approximate salt equivalent |
|---|---|
| 400 mg | 1 g |
| 600 mg | 1.5 g |
| 1,000 mg | 2.5 g |
| 1,500 mg | 3.75 g |
| 2,000 mg | 5 g |
| 2,300 mg | 5.75 g |
To convert sodium in milligrams to salt in grams:
Salt equivalent = sodium × 2.5 ÷ 1,000
These are approximate salt-equivalent calculations. They do not mean that all sodium in a food necessarily came from added table salt.
How Much Sodium Is Recommended?
Recommendations differ slightly between organisations.
| Guidance | Adult sodium recommendation |
|---|---|
| World Health Organization | Less than 2,000 mg daily, equivalent to less than 5 g salt |
| American Heart Association/ACC guidance | No more than 2,300 mg daily, with an ideal limit of 1,500 mg for most adults |
Ask your healthcare professional which target is appropriate for you. These limits refer to the total from food and drink throughout the day, including salt added during cooking or at the table.
A daily limit is not an allowance to add that much salt to meals. Sodium already present in foods also counts.
Read the Label Before Comparing Products
Start with three pieces of information:
- The serving size.
- Sodium per serving or per 100 g.
- How much you actually eat.
Example: Sodium Per Serving
Suppose a packet lists:
- Serving size: 25 g.
- Sodium: 180 mg per serving.
- Amount you eat: 50 g.
You ate two servings, so the sodium total is:
180 × 2 = 360 mg
Its approximate salt equivalent is:
360 × 2.5 ÷ 1,000 = 0.9 g
The numbers in this example are fictional and demonstrate the calculation.
Example: Comparing Per 100 g
| Fictional product | Sodium per 100 g | Sodium in a 50 g portion |
|---|---|---|
| Product A | 600 mg | 300 mg |
| Product B | 400 mg | 200 mg |
For the same portion, Product B provides 100 mg less sodium.
Compare similar products on the same basis. A smaller manufacturer-defined serving can make one product appear lower even when its sodium concentration is higher.
What About Percentage Daily Value?
On US Nutrition Facts labels, 5% Daily Value or less per serving is considered low, while 20% or more is considered high. The reference amount is 2,300 mg sodium daily. This US label system may differ from labels in other countries.
Use the milligram figure and your actual portion when following an individual target.
Look Beyond the Salt Shaker
Sodium may come from packaged foods, prepared meals, sauces, seasonings, and restaurant dishes as well as salt added at home. A food does not have to taste especially salty to contribute sodium.
Review items you eat frequently:
- Bread and other packaged grain foods.
- Pickles and salty accompaniments.
- Sauces, chutneys, and ready-made dressings.
- Stock cubes and seasoning mixes.
- Instant foods and savoury snacks.
- Processed meats and prepared meals.
The amount varies by product and recipe. Check the label rather than assigning one sodium value to an entire food category.
Make Lower-Sodium Cooking More Practical
Choose one repeatable change.
Measure What You Add
If you usually add salt by eye, measuring it can help you understand the recipe. Record the amount and the number of portions the dish actually provides.
Avoid assuming that all salt added to a family dish belongs to one person’s daily intake. Equally, do not ignore salty ingredients already included in the recipe.
Check Seasoning Ingredients
A homemade dish can contain sodium from stock, sauces, packaged masalas, or other ingredients.
Look at the whole recipe before adding more salt.
Try Other Flavours
Consider herbs, spices, garlic, ginger, or lemon where they suit the dish and your dietary needs. The American Heart Association recommends using flavouring alternatives and comparing lower-sodium products.
Plain herbs and spices differ from seasoning blends that contain salt, so read the ingredients.
Keep a Short List of Useful Changes
For example:
| Regular choice | Change to explore |
|---|---|
| A frequently purchased snack | Compare an unsalted or lower-sodium version |
| A ready-made sauce | Measure the portion and compare brands |
| A salty accompaniment | Review how often and how much you use |
| A familiar curry | Record added salt and check packaged ingredients |
Choose changes you can maintain for taste, cost, and preparation time.
Is Sea Salt or Himalayan Salt Better?
Sea salt, rock salt, and Himalayan salt still contribute sodium. Trace minerals do not remove the need to consider total sodium intake.
For blood pressure management, changing the type of salt is not a substitute for reviewing the amount used.
Crystal size can also affect how much fits in a spoon. Weight is a clearer basis for comparison than assuming every teaspoon contains the same amount.
Are Potassium-Based Salt Substitutes Suitable?
Some lower-sodium salts replace part of the sodium chloride with potassium chloride. They can help reduce sodium intake, but suitability needs checking.
Speak with your healthcare professional before using them, especially if you have kidney disease, high potassium, or take medicines that affect potassium levels.
The WHO recommendation for potassium-containing lower-sodium salts excludes people with impaired potassium excretion, including certain kidney conditions and medication circumstances. It is not a universal recommendation for every household member.
Do not start potassium supplements to treat blood pressure yourself.
Track Your Routine Alongside Your Readings
Note when you begin dietary changes in your blood pressure log. Keep measuring according to your agreed schedule.
Avoid attributing a single reading to one salty meal or judging a long-term change from one day.
Use these guides for the monitoring basics:
At your review, discuss both the measurements and any difficulty following the dietary advice.
Keep the Broader Plan in View
Sodium reduction is one part of blood pressure care. Other areas may include appropriate activity, medication, and stress management.
Continue with:
- Daily habits for blood pressure
- Exercise and blood pressure
- Walking and blood pressure
- Stress and high blood pressure
Evidence for dietary changes should be considered separately from commercial relaxation programs. Our Christian Goodman Blood Pressure Exercises review covers that product’s format and claims.
Frequently Asked Questions
Does “No Added Salt” Mean Sodium-Free?
No. The food may still contain sodium from its ingredients. Check the nutrition information.
Does Homemade Food Automatically Have Less Sodium?
No. The result depends on the recipe, added salt, packaged ingredients, and portions.
Should I Eliminate All Sodium?
The aim is an appropriate intake, not a self-prescribed zero-sodium diet. Follow your healthcare professional’s advice.
Can Lowering Salt Replace Medication?
Do not stop or reduce medication yourself. Review treatment with your prescriber using your readings and medical history.
Choose One Product or Recipe to Review
Start with something you eat often. Check its sodium information, work out your usual portion, and identify one manageable change.
For a complete eating-pattern overview, return to the DASH diet for blood pressure.
This article provides general adult nutrition information. Individual sodium and potassium advice should account for your medical conditions and medicines.