A major analysis of more than 222,000 adults found that higher fruit and vegetable intake was associated with reduced dementia risk, with green leafy vegetables showing the strongest protective link.
By yourNEWS Media Newsroom
Eating more fruits and vegetables, especially green leafy vegetables, may be associated with a lower risk of developing dementia, according to a large dietary analysis published in the American Journal of Clinical Nutrition.
The study found that adults with the highest overall fruit and vegetable consumption had about a 20% lower risk of dementia than those with the lowest intake. When researchers examined specific categories of produce, green leafy vegetables were the only subgroup with a statistically significant protective association.
Each additional daily serving of leafy greens was linked to an approximately 18% lower risk of dementia, according to the report.
The findings add to a growing body of research suggesting that diet may play an important role in cognitive health as people age. Leafy greens such as spinach, kale, Swiss chard, collard greens, arugula, romaine lettuce and bok choy contain nutrients and plant compounds that have previously been connected to slower cognitive decline.
Researchers initially analyzed data from more than 18,000 adults age 45 and older who participated in three prospective cohort studies in the United States and the United Kingdom. None of the participants had dementia at the start of the studies, and they were followed for seven to 13 years.
The researchers then combined those findings with data from 13 earlier cohort studies, expanding the total sample to more than 222,000 people.
The analysis accounted for several factors that could influence dementia risk, including age, sex, education, smoking and physical activity. The authors said the size of the study and its long-term design strengthen the findings, though they cautioned that observational research cannot prove cause and effect.
The study reported that higher vegetable intake alone was associated with a 13% lower risk of dementia, while higher fruit intake was associated with a 10% lower risk. Researchers also looked at seven produce subgroups, including cruciferous vegetables, berries and citrus fruits. Among those groups, only leafy greens showed a statistically significant association with lower dementia risk.
The results are consistent with prior research connecting leafy green intake to healthier cognitive aging.
A 2026 study from Edith Cowan University and the Danish Cancer Research Institute found that dietary nitrate from vegetables, especially leafy greens such as spinach, was associated with lower dementia risk. By contrast, nitrate from red meat and processed meat was linked to higher risk.
Other studies have also linked higher vegetable intake to better cognitive performance over time. The Nurses’ Health Study found that women who consumed more vegetables performed better on cognitive tests as they aged.
Researchers said leafy greens may offer unique brain-health benefits because they contain vitamin K, folate, lutein, beta carotene, natural nitrates and polyphenols. These nutrients and compounds have been associated with reduced oxidative stress, improved vascular function and slower cognitive decline.
A study published in Neurology found that nutrients and bioactives in green leafy vegetables were associated with slower rates of cognitive decline in older adults.
The study also aligns with research on the MIND diet, which combines elements of the Mediterranean and DASH diets and places special emphasis on leafy greens. The MIND diet has been shown to slow cognitive decline in older adults.
Antioxidants and polyphenols found in leafy greens may help protect brain cells from oxidative stress, a process associated with neurodegenerative diseases. Natural nitrates in vegetables such as spinach may also support blood vessel function and cerebral blood flow.
The authors said more research is needed to determine whether the protective association comes from individual nutrients, the combined effects of whole foods or broader dietary patterns.
They also emphasized that the study does not prove that leafy greens directly prevent dementia. Instead, the findings suggest a strong association between regular leafy green consumption and lower dementia risk.
The broader evidence points to the value of a diet built around whole foods, including fruits, vegetables, whole grains and healthy fats. Decades of research have associated such eating patterns with a reduced risk of Alzheimer’s disease and other forms of dementia.
For people looking for a simple dietary step that may support brain health, the findings point to the potential benefit of adding a daily serving of leafy greens.
The study’s conclusions reinforce the importance of food-based strategies for cognitive resilience as dementia rates rise with an aging population. While no single food can eliminate dementia risk, regular consumption of spinach, kale or other leafy greens may be a practical part of a broader brain-supportive diet.
Source: Natural News
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