New Report Calls for Combined Sodium-Potassium Strategy in Hypertension Management

A newly published report in The American Journal of Clinical Nutrition argues that public health strategies for managing hypertension should give increased potassium consideration alongside sodium reduction, rather than treating sodium restriction as the primary lever.¹ “Public health guidelines emphasize sodium reduction as the key nutrient-focused dietary strategy to reduce hypertension and cardiovascular disease risk,” the authors state. “However, successful reduction in sodium intake remains a significant challenge because of the prevalent preference for salt taste as well as the complexity of multiple interacting factors such as different dietary habits, food production, and biological/cultural variability in consumers.”

The report, authored by Naomi K. Fukagawa, Paul A. Welling, Janice Johnson, Kristin Reimers, Soo-Yeun Lee, and Patricia Zecca, was supported by the Institute for the Advancement of Food and Nutrition Sciences (IAFNS) Sodium in Food and Health Implications Committee. It reviews the evidence base for current sodium and potassium intake recommendations, strategies for sodium reduction and potassium enhancement, implementation challenges, and directions for future research and policy.

How Large Is the Public Health Burden of Hypertension?

Globally, hypertension affects over 1.28 billion adults and is a leading risk factor for cardiovascular disease, the authors highlight. Both too much sodium and too little potassium in the diet are considered modifiable contributors to high blood pressure, with the World Health Organization (WHO) setting targets of under 2,000 mg of sodium and over 3,500 mg of potassium per day. Most populations still take in more sodium than recommended, while potassium consumption tends to fall short of these targets in wealthier and developing countries alike.

Why Is the Evidence Shifting Toward Potassium?

The authors describe a physiological pathway, referred to as the renal potassium switch, that governs how the kidneys manage sodium and potassium together. This pathway prioritizes retaining potassium over excreting sodium — a tendency compatible with ancestral diets that were naturally high in potassium and low in sodium, but poorly suited to modern diets that are low in potassium and high in sodium. Supporting this, a set of clinical trials found that replacing a modest portion of dietary sodium with a potassium-containing substitute reduced adverse cardiovascular outcomes; separate modeling analyses suggest most of this benefit is attributable to the potassium increase.

“It is time to view dietary interventions holistically because food components interact and physiology is integrative across systems,” Fukagawa explained in a press release from IAFNS.² “Growing evidence shows that increasing dietary potassium as well as reducing sodium intake work together to better manage hypertension.”

What Are the Practical Limits for Reformulation?

The report notes that potassium chloride can typically replace about 25–30% of sodium chloride before a metallic off-flavor becomes detectable. The authors raise the idea of using a sodium-to-potassium ratio as a formulation target, while noting this would not apply to foods such as cured meats, pickles, or bread, where sodium chloride serves a functional role beyond taste. They also point to gradual, incremental reduction, consistent with FDA guidance, allowing consumer taste preferences time to adjust.

What Still Needs to Be Resolved?

The authors call for more dose-response data with potassium in order to establish guidelines for chronic disease risk reduction. They also note that while several countries have adopted sodium-focused labeling or reformulation targets, comparable regulatory efforts for potassium do not yet exist.

“A recent study revealed no true between-person variability in BP response to potassium-enriched salt, implying a nearly universal BP-lowering response,” they also highlight, suggesting population-wide interventions would be likely to be effective as a public health measure.

“There is a new opportunity for collaboration to understand other nutrients/food components that are beneficial for reducing risk factors that food scientists could incorporate in their development of sodium reduction tools, one of which is a new focus on increasing potassium salts in the diet,” the authors note in their conclusion.

References

1. Fukagawa NK, Welling PA, Johnson J, Reimers K, Lee SY, Zecca P. Rethinking the impact of dietary sodium and potassium on blood pressure to advance public health. Am J Clin Nutr. 2026;124(2):101396. doi:10.1016/j.ajcnut.2026.101396
2. Institute for the Advancement of Food and Nutrition Sciences. Boosting potassium should be part of efforts to reduce sodium intake. Newswise. Published July 30, 2026. Accessed July 31, 2026. https://www.newswise.com/articles/boosting-potassium-should-be-part-of-efforts-to-reduce-sodium-intake