Are salt reduction efforts reflected in heart health?

By Caroline SCOTT-THOMAS

- Last updated on GMT

Salt reduction has been linked to major reductions in heart disease in Finland and England
Salt reduction has been linked to major reductions in heart disease in Finland and England

Related tags Salt reduction Blood pressure

Salt reduction efforts around the world are making progress – but how has lower salt consumption affected health?

The premise of salt reduction strategies has been that cutting salt cuts blood pressure, which is a major risk factor for heart disease, stroke, and many other health conditions. However, there are plenty of critics, who argue that just because X leads to Y, and Y leads to Z, that doesn’t necessarily mean that X (high salt intake) leads to Z (higher risk of heart disease and stroke).

The UK’s salt reduction programme is consistently held up as an example for other global initiatives. With about three-quarters of salt consumption coming from packaged foods, its voluntary targets for food manufacturers have helped cut average UK salt intakes from 9.5 g per day in 2002 to about 8.1 g per day in 2014.

After ten years of the UK’s campaign, a study published earlier this year​ suggested that there was indeed a link between salt reduction, lower blood pressure, and deaths from heart disease and stroke. It looked at data on these factors for 30,000 English people from 2003 to 2011 and found average adult blood pressure fell 3/1.4 mm Hg. Meanwhile, mortality from stroke fell 42%, and heart disease, 40%.

‘Likely an important contributor’

Even after controlling for increased fruit and vegetable intake, blood pressure treatment and alcohol consumption, among other factors, lead author Dr Feng He said the findings suggested population-wide salt reduction “is likely an important contributor to the falls in BP [blood pressure]”.

In Finland, where a salt reduction campaign began in the 1970s, average consumption of salt fell by about a third over 30 years, to about 7 g a day for women and 8.3 g a day for men.  According to a 2006 study published in Progress in Cardiovascular Diseases​, during the same time period, average blood pressure (both systolic and diastolic) fell by more than 10 mm Hg, and there was a 75% to 80% decrease in both stroke and coronary heart disease mortality in Finland.

However, the suitability of population-wide salt reduction continues to attract debate, as critics continue to say that correlation does not prove causation.

‘Other risk factors’

In particular, a major review​ of 167 randomised controlled trials published in the Cochrane Library​ and the American Journal of Hypertension​ in 2011 challenged salt reduction policy. The Danish researchers found that although cutting sodium consumption did decrease blood pressure, it also tended to increase levels of hormones, cholesterol and triglycerides, which are all thought to be risk factors for heart disease too.

Commenting on the Finnish data, Dr Larry Appel, director of the Welch Center for Prevention, Epidemiology and Clinical Research at Johns Hopkins Medical Institutions, said it was hard to reconcile existing data with the idea that salt reduction might be harmful.

“I can’t attribute all of the benefit to sodium reduction, but again it is hard to believe that there would be a net benefit from the intervention if indeed sodium reduction were harmful,” ​he told FoodNavigator.

Meanwhile, most people consume far more salt than the 5 g daily upper limit recommended by the World Health Organisation – an average of 8 g to 12 g in Europe.

Related news

Show more

Related products

show more

H&F Pectin: Plant-based alternative to gelatine

H&F Pectin: Plant-based alternative to gelatine

Content provided by H&F – Innovative Solutions for your Product Developments | 12-May-2023 | Application Note

H&F Pectins are excellent as a plant-based alternative to gelatine in many applications.

Flavor technology for bold, bright citrus flavors

Flavor technology for bold, bright citrus flavors

Content provided by ADM: Gain an Edge with Global Consumer Trends | 10-May-2023 | Case Study

Our collaborative global team of expert citrus flavorists combines technology and experience to make ADM the full-service partner you need to shape your...

Future of Functional Beverages in Europe

Future of Functional Beverages in Europe

Content provided by Glanbia Nutritionals | 05-May-2023 | Insight Guide

The strong appeal of functional beverages to support health is changing the RTD landscape in Europe. Here’s a look at Europe’s functional beverage trends...

Create Better-for-Everyone Reduced-Sugar Products

Create Better-for-Everyone Reduced-Sugar Products

Content provided by SweeGen | 04-May-2023 | Product Presentation

Consumers are growing wiser about wellness. Create reduced-sugar products that are better tasting and better for your consumers with Sweegen’s expertise...

Related suppliers

Follow us

Products

View more

Webinars