Peter Attia

and where its reputation may exceed the evidence.

In this episode, we will discuss how different types of fiber, soluble, insoluble, viscous, and fermentable work in the body and how their distinct properties result in different functional outcomes, whether fiber meaningfully impacts satiety, weight management, and glycemic control, and how those effects compare with more potent tools, how certain fibers influence lipid metabolism and cardiovascular risk, and whether their magnitude of effect justify their reputation,

what the mechanistic and epidemiologic evidence really say about fiber's role in colorectal cancer prevention, including the potential influence of short-chain fatty acids like butyrate, who might not tolerate certain fibers well and how to tailor their intake accordingly, how to move beyond the simplistic goal of getting enough fiber towards a more strategic approach that maximizes its actual benefits,

Now, if you're a subscriber and you want to watch the full video of this podcast, you can find it on the show notes page.

If you're not a subscriber, you can watch the sneak peek of the video on our YouTube page.

So without further delay, I hope you enjoy AMA number 77.

It really comes down to the importance of occasionally checking things that we view as axiomatic or dogma.

So the general consensus is that fiber is good, the more you eat the better, end of story, case closed.

But if we're going to be critical of our beliefs, we have to acknowledge that the recommended daily allowance for fiber is almost entirely based on epidemiologic studies.

And we know that epidemiologic studies have left us on the wrong track with many of their recommendations.

And of course, just because epidemiologic studies point to something being the way to do it doesn't mean it's wrong either.

But basically, we just don't have as much clear causal evidence as we would like to make the type of recommendations that we're making.

Now, I would say historically, it's not that I haven't known this.

I've just let it slide because my view has been, what is the harm?

So what if the epidemiology says you should be eating whatever, 50 grams or 30 grams a day?

What's the downside in that?

But look, there's been some polarizing discussions on this topic lately, and you seem to have people accumulating on either sides of this debate.

You've got the, you need zero fiber crowd, obviously more on the carnivore side of the diet landscape.

And then you've got the, if you're not getting 50 grams a day, you're probably going to die.

in the next week or so.