PREDIMED: Does Eating Nuts Prevent Strokes?

PREDIMED: Does Eating Nuts Prevent Strokes?


“PREDIMED: Does Eating
Nuts Prevent Strokes?” The Lyon Diet Heart Trial showed
that a Mediterranean-type diet could significantly reduce the risk
of having a second heart attack, but since many first
heart attacks are fatal, better to prevent heart
attacks in the first place. But no randomized trial
had ever been conducted to test the Mediterranean diet for this
so-called ‘primary prevention’ until now. The PREDIMED study, from the Spanish
PREvención con DIeta MEDiterránea, in which a whopping 7,447 patients
were randomized into three groups. These were folks at high
risk for a heart attack. About half were obese, diabetic, most had high blood pressure,
high cholesterol, but had not yet had their
first heart attack or stroke. A third were told to eat
a Mediterranean diet and given a free quart of extra
virgin olive oil every week. The second group was told
to eat a Mediterranean diet and given a half pound
of free nuts every week, and the third group
was told to follow the American Heart
Association guidelines and reduce their fat intake. No portion control or
exercise advice was given, and they were followed
for about five years. The results were published
in the prestigious New England Journal of Medicine. Now the first thing you do when
you look at a diet intervention trial is you see what the groups
actually ended up eating, which is often very different
from what they were told to eat. For example, the so-called low fat group
started out at 39% of calories from fat, and ended up getting
37% of calories from fat, which is high fat even compared to the Standard American Diet,
which comes in at 33%, something the researchers
plainly acknowledged. In fact the control group didn’t change
their diets much at all over the years, so it can be thought of as the
what-if-you-don’t-do-anything group, which is still an important
control group to have, though the two Mediterranean diet groups
didn’t get much more Mediterranean. They were told to eat
more fruits and vegetables, for example, less meat and dairy, but didn’t accomplish either of
those goals compared to control. The biggest changes reported
were, not surprisingly, in the consumption of the freebies. The group that got a free
jug of extra-virgin olive oil delivered to their home every week
really did start increasing their consumption, in part by replacing some of the refined olive oil they had been using, but
of course would have to pay for. And those that got a half pound
of free nuts sent to them every week for four years straight
did start eating more nuts. Too bad they couldn’t have
slipped a little free broccoli in there, too. So basically they designed a study
to test two different Mediterranean diets versus a low fat diet, but ended up
studying something very different. In essence what happens when
thousands of people switch from consuming about three tablespoons
of olive oil a day, half virgin, to four tablespoons of all virgin,
compared to thousands of people who all the sudden go from eating about
a half an ounce of nuts a day to a whole ounce, compared to thousands of people
who don’t make much of a change at all. It may not have been
what they were hoping for, but these are important research
questions in and of themselves. Let’s say you’re at high risk
for heart disease, eating like this. What would happen
if you started to add like an extra half-ounce
of nuts to your daily diet, or more unrefined olive oil? We didn’t know until now. With no significant differences
in meat and dairy intake, there were no significant differences
in saturated fat or cholesterol intake. So no surprise: no significant differences
in their blood cholesterol levels, and so no difference significantly in their
subsequent number of heart attacks. In the five or so years the study ran,
there were 37 heart attacks in the olive oil group, 31 in the nut group, and
38 in the neither group. No significant difference. Same with dying from a heart attack
or stroke, or dying from any cause. But those in the olive oil, and especially
the nut group, had significantly fewer strokes. All three groups were eating
stroke-promoting diets; I mean, they all had strokes in them
after eating these diet for years, and so ideally, you know, we’d choose diets
that can stop or reverse the disease process, but the diet with added extra virgin olive
oil caused about a third fewer strokes, and adding nuts seemed to cut
their stroke risk nearly in half. If this worked as well
in the general population, in the U.S. alone that would mean
preventing 89,000 strokes a year. That would be like ten strokes
an hour around the clock, prevented by simply adding half
an ounce of nuts to one’s daily diet.

14 thoughts on “PREDIMED: Does Eating Nuts Prevent Strokes?

  1. Your videos for some reason are not coming out in order which makes it harder for people to see if a new video came out. I have realized this and learned to account for it, but others probably haven't and i think its hurting the view count.

    Content is great as always!

  2. This is really confusing when you hear people like Ornish, Esselstyn, and McDougall tell you over and over and over again: "NO nuts —- no OIL —-NO—-NO—-NO oil or nuts. NO..
    PERIOD !

  3. Hi Doctor. Wondering if the benefits of nuts elucidated in this series applies to nut butters as well. I would assume so since it's the same food grounded up, but who knows.

  4. Lock him Up !!! d trump d trump does not need to do research he just asks the crown prince if he is guilty and believes him to his personal interest and son in law jareds

  5. In the study cited in this video, go to 0:29" you'll see the names of the scientists involved in that PREDIMED study. Among them you'll see two names: Emilio Ros and Jordi-Salas Salvado. Both work for the Spanish nut and olive oil industry. The PREDIMED study is a hoax and I believe has been retracted since.

  6. Jeff on vegsource is saying all these nut studies are rigged and sponsored by the nut companies. He mentioned asking Dr. Greger to speak with him on youtube. What is up with this ?

  7. Ive recently been interested in preventing strokes. Cancer doesn't run in my family, the only thing (physically) that runs in our family is strokes. We thought my grandpa was the first with alzeihmers, but turns out it's damage from LOTS of mini strokes.

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