Could something as ordinary as a glass of water influence your brain health decades from now? Most people associate dementia risk with aging, genetics, or lifestyle habits, but new research suggests another factor may deserve attention.
A major study involving more than 54,000 Danes has found that the source of nitrate in a person's diet could be linked to dementia risk. The research, conducted by Edith Cowan University and the Danish Cancer Research Institute, followed participants for up to 27 years.
Not all nitrate is equal
Researchers discovered a striking difference depending on where nitrate came from. People who consumed higher amounts of nitrate from vegetables such as spinach and other leafy greens were less likely to develop dementia.
In contrast, higher intake of nitrate and nitrite from red meat, processed meat, and drinking water was associated with an increased risk.
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The findings suggest that vegetables may provide protective compounds that help the body process nitrate differently than animal-based foods.
Drinking water raises questions
One of the study's most notable findings involved drinking water. Researchers observed a higher rate of dementia among people exposed to nitrate in drinking water, even at levels below current European Union limits.
The study does not suggest that people should avoid drinking water. Instead, scientists say the results highlight the need for further investigation into the long-term effects of low-level nitrate exposure.
More research needed
The researchers stress that the study cannot prove cause and effect. Because it was observational, it can only identify associations rather than demonstrate that nitrate directly causes dementia.
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Even so, the findings add to growing evidence that dietary choices may play an important role in long-term brain health. The researchers say the results support diets rich in vegetables while limiting processed and red meat consumption.
Sources: Alz Journals and Science Daily