e-Library of Evidence for Nutrition Actions (eLENA)


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Reducing sodium intake to control blood pressure in children

Intervention | Last updated: 19 May 2023


Cardiovascular diseases (CVDs) are the leading cause of death globally. An estimated 17.8 million people died from CVDs in 2017, representing approximately 32% of all deaths worldwide. High blood pressure (hypertension) is a major risk for CVDs. Children with elevated blood pressure are at high risk of CVD pathology during childhood, and are also at high risk for hypertension and CVDs as adults.

Evidence shows that reducing sodium intake significantly reduces blood pressure in adults and children. Sodium is found not only in table salt, but also naturally in a variety of foods, including milk, cream, eggs, meat and shellfish. It is also found in much high amounts in processed foods, such as breads, crackers, processed meats like bacon and snack foods such as pretzels, cheese puffs and popcorn, as well as in condiments such as soy sauce, fish sauce, and bouillon or stock cubes.

WHO Recommendations


WHO recommends a reduction in sodium intake to control blood pressure in children aged 2–15 years.

The recommended maximum level of intake of 2 g/day sodium in adults should be adjusted downward based on the energy requirements of children relative to those of adults.

 

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These recommendations recognize that salt reduction and salt iodization are compatible. Monitoring of salt intake and salt iodization at country level is needed so that salt iodization can be adjusted over time as necessary, depending on observed salt intake in the population, to ensure that individuals consuming the recommended amount of sodium will continue to consume sufficient iodine.

These recommendations complement the WHO guideline on potassium consumption and should not be interpreted to replace or supersede that guideline. Public health interventions should aim to reduce sodium intake and simultaneously increase potassium intake through foods. Additional information can be found in the guidance summary, and in the guideline under 'WHO documents' below.


     

 



Evidence


Systematic reviews used to develop the guidelines


Effect of reduced sodium intake on blood pressure, renal function, blood lipids and other potential adverse effects

Aburto NJ, Das S. Geneva: World Health Organization; 2012.


Effect of reduced sodium intake on blood pressures and potential adverse effects in children

Aburto NJ, Ziolkovska A. Geneva: World Health Organization; 2012.


Effect of lower sodium intake on health: systematic review and meta-analyses

Aburto NJ, Ziolkovska A, Hooper L, Elliott P, Cappuccio FP, Meerpohl JJ. BMJ. 2013;346:f1326.


Related Cochrane reviews


Effects of low sodium diet versus high sodium diet on blood pressure, renin, aldosterone, catecholamines, cholesterol, and triglyceride

Graudal NA, Hubeck-Graudal T, Jurgens G.Cochrane Database of Systematic Reviews 2017, Issue 4. Art. No.: CD004022.

Summary of this review Alternate Text

Cost-effectiveness Learn More Alternate Text


Relevant cost-effectiveness analyses have not yet been identified.