Dr. Michael Greger

The benefits are that great.

Are that great.

And that's, in the Adventist cohort, the Loma Linda and Adventist cohort, they think it accounts for two years of extra life span.

Come on.

It is one of the only foods, there's only two foods that have ever been associated with increase in literally years, plural, a single food.

And nuts is one of them.

Okay, so what you do is you take hundreds of thousands of people.

You follow them, their diseases, and their diets over time.

So you keep doing these dietary surveys.

Exactly what are you eating?

You can do these random call you up.

Okay, what did you eat in the last 24 hours?

Go through.

Sometimes you make them take pictures.

And so you follow that, and then you follow exactly, you know their doctors, and so you know, what have they been diagnosed as?

What are they dying of?

You know, what did their autopsy show?

And so you can follow them all the time.

That's what's called observational research or epidemiological research.

Now you cannot prove cause and effect with that kind of research because there's confounding factors.