By Desire Uzochukwu
Scientists in Japan have identified a soy-derived compound that could help protect the brain against some harmful effects of excessive salt consumption, raising fresh hopes for nutritional approaches to tackling hypertension and salt-related cognitive decline.
The compound, known as LPC70, reportedly improved blood pressure, memory and social interaction in mice fed a high-salt diet, according to research from Fujita Health University published in the journal Neurochemistry International.
The findings, announced on October 18, 2026, suggest that the compound may work by regulating chemical signalling pathways in the kidneys and brain, potentially helping to counter some of the damage associated with excessive salt intake.
Although high salt consumption is widely associated with hypertension and cardiovascular disease, researchers are increasingly investigating its possible effects on memory, thinking and other brain functions.
In the study, mice exposed to a high-salt diet developed elevated blood pressure, showed reduced social interaction and performed poorly in tests measuring their ability to recognise objects they had encountered previously.
However, animals whose diets were supplemented with LPC70 showed improvements in these measures compared with those that consumed excess salt without the supplement.
The researchers found that the compound appeared to influence prostaglandins, chemical messengers involved in regulating blood pressure, inflammation and several functions within the brain.
Professor Akihiro Mouri, who led the research alongside Dr Hisayoshi Kubota and Dr Kazuhiro Kagotani, said the study sought to establish how LPC70 coordinates changes in prostaglandin signalling across different organs.
The findings revealed contrasting effects in the kidneys and brain. In the kidneys, LPC70 reduced changes in signalling components associated with salt-induced hypertension. In the prefrontal cortex, a brain region involved in memory, thinking and social behaviour, the compound restored levels of a receptor associated with protective and anti-inflammatory signalling.
Researchers also observed changes in the way the animals produced prostaglandins from arachidonic acid, a fatty acid used by the body to manufacture these signalling molecules.
The results suggest that LPC70 may help regulate these pathways differently depending on the organ involved, offering a possible explanation for its effects on both blood pressure and cognitive performance.
The compound is a form of soy-derived lysolecithin containing more than 70 per cent lysophosphatidylcholine among its phospholipids. Previous animal research had already indicated that LPC70 could ease salt-related hypertension and cognitive difficulties, but the latest study examined the possible biological mechanisms behind those effects.
Professor Mouri said the research could provide a foundation for future clinical investigations and dietary interventions aimed at reducing hypertension-related cognitive decline and promoting healthy ageing.
However, the researchers cautioned that the findings were based on animal experiments. Clinical studies will be needed to establish whether LPC70 produces similar benefits in humans, as well as to determine appropriate doses, safety and long-term effectiveness.
The findings do not mean that consuming soy products or taking LPC70 supplements can currently be relied upon to prevent salt-related brain damage in people.
Excessive salt consumption remains a recognised health concern, and the new research does not establish that the compound can eliminate the risks associated with a high-salt diet.
Nevertheless, the study offers a promising new direction for scientists exploring how food-derived compounds might help protect cardiovascular and brain health.
If the benefits are confirmed in human trials, LPC70 could eventually contribute to the development of functional food ingredients designed to support blood pressure control and healthy cognitive ageing.
