Longevity & Aging

Where Your Nitrate Comes From May Determine Your Dementia Risk

A large Danish study tracking over 54,000 adults for up to 27 years found that nitrate's effect on dementia risk depends entirely on its source. People eating more nitrate-rich vegetables — about one cup of baby spinach daily — had a lower risk of developing dementia. But higher nitrate and nitrite intake from red meat, processed meat, and drinking water was linked to greater dementia risk. Researchers believe vegetables provide antioxidants that steer nitrate toward producing beneficial nitric oxide, while meat and water lack these compounds, allowing harmful N-nitrosamines to form instead. Notably, even drinking water nitrate levels below current regulatory limits were associated with increased dementia risk — a first-of-its-kind finding requiring further investigation.