Mark Sisson
speaker
665 appearances
2 recordings
2 series
first heard Sep 2025
last heard 17 Apr
Mark Sisson’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Apr 2026 with 1.
Appearances
And I don't think anyone is going to argue that a Jif peanut butter is healthy.
So then there's a healthy option for peanut butter, right?
And I'll put healthy in quotes.
That's the natural peanut butter that you find in the store.
And it's fresh ground peanuts and you have to mix it together because the oil's on top.
What we're missing here is that there are actual studies looking at this oil on top of the peanut butter, which is peanut oil.
And that oil from a peanut is highly polyunsaturated, which means it's very susceptible to oxidation or rancidity, rust.
And that goes rancid with peroxide values above 80 milliequivalents per kilogram, which is just a metric that we use to see how rusted or rancid an oil is.
And 80 is very high.
It goes to that level within four weeks, Megan.
What's crazy about this is when you look at those natural peanut butters on the shelf of a grocery store, they have a shelf life of 12 to 18 months.
So many of them, and I used to eat these, are frankly rancid, and they're going to create problems in humans when you're eating them.
So this isn't to say don't eat peanuts if you like peanut butter, but two things to consider.
You don't want moldy peanuts.
We know that peanuts are high in aflatoxin, which is a known carcinogen.
It's strongly linked to liver cancer from a mold that grows on peanuts called aspergillus.
So peanut butter is often more moldy and more high in alpha toxin than fresh peanuts.
But if you want to make peanut butter for yourself or your kids, the ideal thing to do would be to go to the store that has one of the fresh ground peanut things or to make your own peanut butter, to take the peanuts, preferably organic, and grind them yourself and then eat that peanut butter within a week, five days, because you know that...
it's going to be problematic.
And then you should not store that peanut butter on your countertop.
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