Transcript: Testing the Pistachio Principle
Both the pistachio principle and the fecal excretion theory were put to the test recently, by studying the effects of peanut processing on body weight. Let’s feed a bunch of people a half cup of peanuts every day for a month, and another group we’ll feed the same amount of nuts—but we’ll grind them into peanut butter first.
So, half a cup of peanuts’ worth of peanuts, versus peanut butter. And, that was added on top of whatever else they were eating in their regular diet. So, calorie-wise, at the end of the month, they should have put on a few pounds.
Well, as we saw before, in the whole-nut peanut group, that just didn’t happen. But, that’s why we have the peanut butter group, right? Not a lot of shelling or crunching necessary with peanut butter. And, the cell walls of the peanuts were all ground up; all the oil released and made available for absorption. And, they didn’t go extra chunky; this was smooth peanut butter.
So, if the reason people don’t gain weight on nuts is because of all that chewing, or fecal fat loss, then the prediction would be that although the whole-nut group may not pile on the pounds, the peanut butter group definitely would. But, they didn’t. Neither group gained the expected weight.
The plot thickens. Next, we’ll explore the dietary compensation theory.
To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring watch the above video. This is just an approximation of the audio contributed by Kerry Skinner.
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