A new Harvard University study found that consuming half a tablespoon of olive oil daily is linked to a lower risk of dementia-related death. Researchers analyzed data from 92,383 U.S. adults over 28 years and discovered that consuming at least seven grams of olive oil daily was associated with a 28% lower risk of dementia-related death.
This study builds on established links between olive oil consumption and reduced risk of Alzheimer’s disease. WHO data shows that over 55 million people had dementia worldwide in 2023, with rates expected to triple by 2050. Scott Small from Columbia University noted that dementia in its final stages affects brain functions crucial for heart rate and breathing.
The study highlighted the importance of olive oil regardless of adherence to the Mediterranean diet or the Alternative Healthy Eating Index. Replacing five grams of mayonnaise with olive oil was linked to a 14% lower risk of dementia-related death, while replacing margarine showed an 8% reduction.
Researchers acknowledged limitations, including the study’s observational nature and a non-representative sample mostly comprising older, white healthcare professionals. Future studies should provide olive oil to participants to assess its direct impact on cognitive function.