Olive Oil Consumption May Reduce Dementia-Related Death Risk by 28%: Harvard Study

Boston, Massachusetts United States of America
Consuming at least 7 grams (about half a tablespoon) of olive oil daily may reduce the risk of dementia-related death by 28%.
Harvard University researchers found this link in a series of studies published in JAMA Network Open.
The studies involved over 92,000 adults observed for 28 years.
Olive Oil Consumption May Reduce Dementia-Related Death Risk by 28%: Harvard Study

In a series of studies published in the journal JAMA Network Open, researchers from Harvard University's T.H. Chan School of Public Health found that consuming at least 7 grams (about half a tablespoon) of olive oil daily may reduce the risk of dementia-related death by 28% compared to those who never or rarely consumed olive oil. The studies, which involved over 92,000 adults observed for 28 years, suggest that this Mediterranean staple could play a protective role in brain health due to its antioxidant compounds that can cross the blood-brain barrier and indirectly benefit the brain by improving cardiovascular health. The researchers noted that olive oil's monounsaturated fats may contribute to these benefits, as well as its polyphenols and vitamin E content. These findings add to a growing body of evidence supporting the potential benefits of olive oil for brain health.



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  • Unique Points
    • A daily consumption of at least 7 grams (a bit over half a tablespoon) of olive oil is linked with a 28% lower risk of dementia-related death compared to those who never or rarely eat olive oil.
    • Consuming at least 7 grams of olive oil daily may reduce the risk of fatal dementia.
    • Olive oil may have benefits for brain health due to antioxidant compounds that can cross the blood-brain barrier and indirectly affect the brain by benefiting cardiovascular health.
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  • Unique Points
    • A new Harvard study suggests that consuming olive oil could help reduce the risk of dying from dementia, regardless of overall diet quality.
    • People who consumed at least 7 grams of olive oil per day had a 28% lower risk of dementia-related death compared with those who never or rarely ingested olive oil.
    • Olive oil is rich in monounsaturated fats and contains compounds with antioxidant activity that may play a protective role for the brain.
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  • Unique Points
    • Consuming about half a tablespoon per day of olive oil might reduce the risk of dementia-related death.
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    • At the start of the study, the mean olive oil consumption was 1.3 grams/day.
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  • Unique Points
    • A new study found that consuming more than 7 grams a day of olive oil is associated with a 28% lower risk of dementia-related death.
    • Olive oil contains high levels of monounsaturated fatty acids, vitamin E, and polyphenols which can help protect the body from type 2 diabetes, heart disease, and some cancers. They also aid digestion and support brain health.
    • Extra virgin olive oil contains higher levels of antioxidants by way of polyphenols which can reduce the risk of certain chronic diseases like cancer, diabetes, and other brain-related degeneration.
    • When picking an olive oil, look for extra virgin or cold-pressed organic varieties to ensure the highest nutritional profile.
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