Scientists have identified a few species among the many trillions of microbes that live in your intestines that play a crucial role in gut health and maintaining a balanced immune system. Your dietary intake is vital to allowing these species to flourish and to preventing imbalances that can lead to disease. However, there are stressors to our digestive system and blood vessels. Here Jonathan D. Grinstein, ScientificAmerican.com, reflects on a new connection between the gut and brain:
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“It is well known that a high salt diet leads to high blood pressure, a risk factor for an array of health problems, including heart disease and stroke. But over the last decade, studies across human populations have reported the association between salt intake and stroke irrespective of high blood pressure and risk of heart disease, suggesting a missing link between salt intake and brain health.
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Interestingly, there is a growing body of work showing that there is communication between the gut and brain, now commonly dubbed the gut–brain axis. The disruption of the gut–brain axis contributes to a diverse range of diseases, including Parkinson’s disease and irritable bowel syndrome. Consequently, the developing field of gut–brain axis research is rapidly growing and evolving. Five years ago, a couple of studies showed that high salt intake leads to profound immune changes in the gut, resulting in increased vulnerability of the brain to autoimmunity—when the immune system attacks its own healthy cells and tissues by mistake, suggesting that perhaps the gut can communicate with the brain via immune signaling.
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Now, new research shows another connection: immune signals sent from the gut can compromise the brain’s blood vessels, leading to deteriorated brain heath and cognitive impairment. Surprisingly, the research unveils a previously undescribed gut–brain connection mediated by the immune system and indicates that excessive salt might negatively impact brain health in humans through impairing the brain’s blood vessels regardless of its effect on blood pressure.
This research proposes new therapeutic targets for countering stroke—the second leading cause of death worldwide—and cognitive dysfunction.”
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Read More … Article Source: https://www.scientificamerican.com/article/a-new-connection-between-the-gut-and-brain1/
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