Study Tracks Higher Dementia Risk at 5 mg/L Water Nitrate as Vegetable Intake Lowers It
Updated
Updated · ScienceDaily · Jun 8
Study Tracks Higher Dementia Risk at 5 mg/L Water Nitrate as Vegetable Intake Lowers It
3 articles · Updated · ScienceDaily · Jun 8
Summary
More than 54,000 Danish adults followed for up to 27 years showed higher dementia rates with nitrate in drinking water and with nitrate or nitrite from red and processed meat, while vegetable-derived nitrate was linked to lower risk.
About one cup of baby spinach a day marked the higher vegetable-nitrate intake associated with lower dementia risk, which researchers said may reflect antioxidants and vitamins helping form beneficial nitric oxide instead of harmful N-nitrosamines.
Water nitrate was tied to higher dementia risk at concentrations as low as 5 mg/L, well below the 50 mg/L limit used in Denmark and the EU, making this the first reported association of its kind.
The researchers said the observational study cannot prove cause and effect, but argued the findings warrant more research and a review of long-term low-level nitrate exposure standards rather than any reduction in water consumption.
Is your legally 'safe' drinking water silently increasing your risk of dementia?
Why is nitrate in spinach a brain-booster, but in bacon a potential threat?
Nitrate’s Double-Edged Sword: Vegetable vs. Animal and Water Sources in Dementia Risk
Overview
Recent research highlights that the source of dietary nitrate is more important for brain health than the total amount consumed. Nitrate from vegetables is linked to a lower risk of dementia and may protect cognitive function, while nitrate and nitrite from processed meats, animal products, and drinking water are associated with a higher risk. This dual role of dietary nitrate was revealed in a major observational study, which cannot prove causation but shows strong associations. These findings suggest that choosing vegetable sources of nitrate could support long-term brain health and reduce dementia risk.