Most people associate high blood pressure with too much salt, too little exercise or a stressful lifestyle. But a growing body of international research suggests the explanation may be far more complex.
Scientists now believe the immune system could play a much bigger role in the condition than previously thought, reports Médium.
Studies from the UK Biobank, Professor Tomasz Guzik's research team and Professor Francine Marques at Monash University are helping reshape the understanding of hypertension.
Their findings suggest that chronic inflammation may be one of the hidden mechanisms driving high blood pressure.
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Everyday factors matter
One of the most surprising discoveries involves oral health. According to analyses based on UK Biobank data, chronic gum disease may contribute to high blood pressure because bacteria from inflamed gums can enter the bloodstream and keep the immune system in a constant state of low-grade inflammation.
Researchers have also identified air pollution as another possible contributor. Tiny particles produced by traffic, including tyre and brake wear, can pass from the lungs into the bloodstream, where they may trigger inflammatory responses that gradually reduce the flexibility of blood vessels.
A changing understanding
Research led by Professor Tomasz Guzik has found evidence that specific immune cells play a central role in the development of hypertension.
Experimental studies suggest these cells are not simply reacting to the disease but may actively contribute to its progression by promoting inflammation in blood vessels and the kidneys.
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At the same time, Professor Francine Marques and her team at Monash University have highlighted the importance of the gut microbiome.
When beneficial gut bacteria break down dietary fibre, they produce short-chain fatty acids that help regulate the immune system and reduce inflammation, potentially supporting healthier blood pressure.
More than salt
The findings do not replace well-established advice such as staying physically active, maintaining a healthy weight and eating a balanced diet.
Instead, they expand the picture by suggesting that oral health, gut health and long-term exposure to polluted air may also play an important role in preventing high blood pressure.
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As scientists continue to investigate the connection between immunity and cardiovascular health, the traditional view of hypertension is gradually giving way to a broader understanding of the disease.
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