Scientists Identify a Natural Compound That May Shield the Brain From Excess Salt

Scientists in Japan have discovered that a soy-derived compound may help reduce certain effects of excessive salt on brain problems.

Researchers at Fujita Health University found that mice on a high-salt diet had difficulty with memory and social interaction, while those given a compound called LPC70 showed improvement.

The findings are particularly relevant in the United States, where adults consume more than 3,300 milligrams of sodium daily on average, according to the Centers for Disease Control and Prevention.

Although researchers have not proven the compound effective in humans, the research suggests that excessive salt may affect more than blood pressure.

Published in Neurochemistry International, the study examined how LPC70 affects chemical signaling in the brain and kidneys. The findings became available online on May 14, 2026, before appearing in the journal’s July issue.

The research gained renewed attention in October, highlighting a less familiar aspect of dietary salt: its potential relationship with specific behaviors and brain processes.

Why Researchers Investigated This Soy Compound

Scientists wanted to understand how LPC70 could influence the biological effects of excessive salt consumption.

The investigation involved Professor Akihiro Mouri, Dr. Hisayoshi Kubota, and Dr. Kazuhiro Kagotani. LPC70 is a specially prepared soy ingredient containing more than 70% lysophosphatidylcholine among its phospholipids.

Earlier experiments suggested the compound could reduce hypertension and cognitive difficulties in mice fed excessive salt.

“We wanted to understand the role of LPC70 in coordinating changes in PG signaling across organ systems,” Mouri explained in a statement released by Fujita Health University.

PG refers to prostaglandins, chemical messengers involved in different biological processes. Researchers wanted to understand how these substances responded to LPC70 in different organs.

The Surprising Changes in Memory and Social Behavior

The mice showed difficulties with recognition memory and social interaction, with no substantial changes in general movement.

Researchers fed mice a diet containing 8% sodium chloride for 10 weeks. They monitored blood pressure and conducted behavioral tests to examine how the animals responded to familiar objects and other mice.

The high-salt diet increased blood pressure and reduced performance on an object recognition task. The animals also showed less social interaction.

However, their general movement and anxiety-related behavior remained largely unchanged. This suggested the observed difficulties were specific, not evidence of an overall decline in activity.

Mice receiving LPC70 showed improvements in the affected behavioral measurements and lower blood pressure compared with those consuming excessive salt without the compound.

Related: 8 Everyday Mistakes That Quietly Damage Brain Health

What Happened Inside the Brain and Kidneys

The compound appeared to influence different chemical signaling pathways depending on the organ involved.

In the kidneys, excessive salt increased expression of cyclooxygenase 2 (COX-2) and a receptor called EP3. LPC70 reduced these changes, which may help explain its effects on blood pressure.

The brain showed a different response.

In the prefrontal cortex, a region associated with cognitive processes and social behavior, excessive salt reduced expression of a receptor called DP1. LPC70 counteracted this reduction without changing another receptor, DP2.

Researchers also examined arachidonic acid, a fatty acid involved in producing prostaglandins. High salt consumption reduced its circulating levels, while LPC70 treatment increased certain prostaglandins, including PGE2 and PGD2.

These findings suggested that the ingredient may influence distinct biological pathways across different organs. However, the experiments did not establish that any single pathway caused all the observed improvements.

The Commercial Collaboration Behind the Study

The research involved a partnership between university scientists and a company developing naturally derived food ingredients.

Fujita Health University confirmed that Tsuji Oil Mills Co., Ltd. collaborated on the investigation and provided financial support. Japanese scientific organizations and research foundations also provided additional funding.

The partnership provides context for the interest in LPC70 as a potential functional food ingredient. It does not establish improper influence over the findings.

Importantly, LPC70 is not equivalent to ordinary soy foods. The experiments used a specially prepared substance, so the results cannot be assumed to apply to tofu, soy milk, or other familiar soy products.

What the Findings Mean for Future Research

The study offers promising laboratory evidence, but scientists have not established that LPC70 protects human brain function.

The experiments involved mice, and researchers have not determined an effective human dosage, long-term safety, or clinical benefits. The findings also do not demonstrate that the compound prevents Alzheimer’s disease or other forms of dementia.

Further studies are needed to determine whether the observed biological effects can be reproduced in people.

For American readers, the research adds another dimension to an established public health concern. The CDC recommends that adults consume less than 2,300 milligrams of sodium daily, substantially below current average intake.

The findings do not change that guidance or suggest that a supplement can offset excessive salt intake. Instead, they offer scientists another way to investigate how dietary habits may influence the nervous system.

If excessive salt can affect specific aspects of behavior in mice, what might future research reveal about its relationship with human memory and brain function?

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