Dietary sources of sodium
Pro Research Analysisby 
Searched over 200M research papers
Major Dietary Sources of Sodium: Processed and Packaged Foods
Across many countries, the main source of dietary sodium is processed and packaged foods. In the United States, more than two-thirds (about 70–77%) of sodium intake comes from foods prepared outside the home, especially commercially processed foods such as breads, pizza, cold cuts, soups, savory snacks, poultry, cheese, and mixed dishes like sandwiches and burritos 2634+1 MORE. Similar patterns are seen in Australia and New Zealand, where cereal-based mixed dishes, breads, processed meats, gravies, and sauces are leading contributors to sodium intake 15. In these countries, sodium added during food processing far outweighs the amount added at home during cooking or at the table 368.
Discretionary Sodium: Salt Added at Home
The amount of sodium added at home—either during cooking or at the table—varies by country and economic development. In high-income countries like the US, Australia, and New Zealand, discretionary salt use (salt added at home) accounts for a much smaller proportion of total sodium intake, typically less than 15% 1367+1 MORE. In contrast, in many low- and middle-income countries, such as China, India, and Brazil, the majority of sodium comes from salt added during home cooking or at the table, sometimes exceeding 50% of total intake 789. For example, in China, about 69% of sodium intake is from salt added to food at home, with soy sauce as another significant source .
Key Food Categories Contributing to Sodium Intake
Specific food categories contribute most to sodium intake in different populations:
- In the US, top sources include pizza, breads, cold cuts, soups, burritos, savory snacks, poultry, cheese, and mixed dishes 210.
- In Australia and New Zealand, cereal-based mixed dishes, breads, processed meats, gravies, sauces, and bread-based dishes are major contributors 15.
- In New Zealand, bread alone accounts for about 18% of sodium intake, with bread-based dishes, grains, pasta, pork, and processed meats also significant .
- In China, salt added during cooking is the main source, followed by soy sauce and, in some regions, flour products .
Influence of Economic Development and Food Environment
The proportion of sodium from discretionary sources (added at home) is inversely related to a country's economic development. As countries become wealthier and more urbanized, the share of sodium from processed foods increases, while the share from home-added salt decreases 78. This means that in high-income countries, efforts to reduce sodium intake should focus on reformulating processed foods, while in lower-income countries, public health strategies should also address salt use in home cooking 78.
Conclusion
Most dietary sodium comes from processed and packaged foods, especially in high-income countries, with breads, mixed dishes, processed meats, and snacks being the top contributors. In lower-income countries, salt added at home remains the main source. Understanding these patterns is crucial for designing effective sodium reduction strategies tailored to each country’s food environment and cultural practices 1234+6 MORE.
Sources and full results
Most relevant research papers on this topic