Does Olive Oil Protect Against Stroke?

Older adults with high olive oil consumption have a lower risk of stroke, according to French investigators.

The Mediterranean diet, rich in olive oil, has long been linked to lower rates of stroke and other health benefits.  The French researchers wondered stroke prevention might be attibutable to higher olive oil consumption.  Triglyceride esters of oleic acid comprise the majority of olive oil, and oleic acid blood levels reflect olive oil consumption. 

Have you heard of monounsaturated fatty acids?  Oleic acid is one.


Over 7,000 older adults without history of stroke were surveyed with regards to olive oil consumption.  Oleic acid plasma levels were measured in over a thousand of the study participants.  Over the course of five years, 175 strokes occurred.

Compared with those who never used olive oil, those with the highest consumption had a 41% lower risk of stroke.  The researchers made adjustments for other dietary variables, age, physical activity, and body mass index.

In looking at the plasma oleic acid levels, those in the highest third of levels had 73% lower risk of stroke compared to those in the lowest third.


Results suggest that the olive oil in the Mediterranean diet  may help explain the diet’s protection against stroke.  They also support my inclusion of olive oil in the Low-Carb Mediterranean Diet and Advanced Mediterranean Diet.

Steve Parker, M.D.

Reference:  Samieri, C. et al.  Olive oil consumption, plasma oleic acid, and stroke incidence: the Three-City StudyNeurology, Published online before print June 15, 2011, doi: 10.1212/WNL.0b013e318220abeb


Filed under Health Benefits, Mediterranean Diet, olive oil, Stroke

3 responses to “Does Olive Oil Protect Against Stroke?

  1. great article and work. Special thanks.

    Data like this cheers one up and offers some hope that by golly yes
    diet and what you eat are critical issues and choices.

  2. Jim, I read somewhere in the last few days that 40% of our health status depends on lifestyle choices like diet, smoking, exercise, alcohol, etc. The rest depends on genetics and luck. The 40% figure is debatable, of course.


  3. If I can have a positive effect on the 40% of things that I can control, I certainly will.