"The takeaway is that a healthy diet rich in antioxidants from dark leafy greens and orange-pigmented fruits with or without antioxidant supplements may reduce the risk of developing dementia
"But the only way to prove the connection between antioxidants and brain health is with a long-term, randomized clinical trial to see.
For this new research, study author May Beydoun of the NIA, in Baltimore, and colleagues studied nearly 7,300 people, aged 45 to 90,
The individuals were divided into three groups, depending on the level of antioxidants in their blood, and followed for an average of 16 years and as many as 26 years.
The researchers found that those who had the highest amount of the antioxidants lutein and zeaxanthin in their blood were less.
likely to develop dementia than those who had lower levels. Lutein and zeaxanthin are found in green leafy foods like kale, spinach, broccoli and peas.
Every increase in standard deviation (a measure of how dispersed the data is in relation to the average) of those antioxidant levels in the study was associated with a 7% decrease in dementia.