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Sigma Nutrition Radio

#600: Finite Knowledge, Infinite Ignorance

Sigma Nutrition Radio

Danny Lennon

Health & Fitness, Nutrition

4.8 ā€¢ 633 Ratings

šŸ—“ļø 31 March 2026

ā±ļø 120 minutes

šŸ”—ļø Recording | iTunes | RSS

šŸ§¾ļø Download transcript

Summary

"The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance. For this, indeed, is the main source of our ignorance ā€” the fact that our knowledge can be only finite, while our ignorance must necessarily be infinite."Ā ā€“ Karl Popper

To mark Sigma Nutrition's milestone 600th episode (and 12-year anniversary), Danny and Alan examine several areas in which their views have changed, softened, strengthened, or remained stable over the lifespan of the podcast.

The discussion is therefore not only about nutrition itself, but also about the process of scientific reasoning: how positions are formed, what type of evidence can shift them, and why changing one's mind is often a sign of better thinking rather than inconsistency.

The episode therefore serves as both a review of several specific nutrition controversies and a lesson in scientific epistemology. They discuss topics such as red meat, protein, dietary cholesterol, omega-3s, flavonoids, and sodium.

Timestamps

  • [11:04]Ā Time-restricted eating
  • [19:32]Ā Protein intake, quality & dosing
  • [35:04]Ā Cocoa flavanols and cognition
  • [51:38]Ā Unprocessed red meat
  • [01:05:23]Ā Omega-3 supplementation
  • [01:23:10]Ā Dietary cholesterol
  • [01:44:41]Ā Sodium J-curve myth
  • [01:53:41] Energy balance model

Links

Transcript

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0:00.0

Hey everyone. I just wanted to give a quick message before we get into this episode. As you'll hear,

0:05.1

this is somewhat of a milestone for the podcast being not only the 600 episode of the podcast,

0:10.8

not including our premium exclusive episodes, but it's also the 12 year anniversary of this

0:16.4

podcast starting. And I just wanted to say thank you so much to all of you who are listening right now

0:22.6

to have listened to any time over those 12 years whether that's from the very start from

0:27.4

some time over those years or even more recently and for your support for telling other people

0:35.1

about the podcast for sharing the episodes for letting people know through a recommendation about it.

0:41.3

And of course, to those you who subscribe as a premium subscriber and support the show directly,

0:47.0

that is literally what allows me to continue doing these podcasts.

0:51.1

And I just want to say, thank you so much for that.

0:53.8

It really, really means a lot and through

0:56.7

whatever way that you have helped the show either through listening sharing or supporting directly

1:03.6

as a premium member it really does make a huge difference and like I said it what allows this

1:09.9

show to continue to run so So thank you for that.

1:13.5

To mark the occasion, as you'll hear in a few moments, we're going to do something a bit different.

1:18.0

Alan and I are going to discuss some of the things that over the many years we've been doing this podcast,

1:24.3

positions that we have maybe changed our opinion on or modified our position on slightly.

1:29.3

These will include some things where we maybe have a different conclusion now,

1:34.3

thanks to coming across new evidence or considering a topic in more detail.

1:39.3

We're going to discuss what our old position was, maybe what led to that changing and our current new position on that.

1:46.8

And then a couple of examples of things where our conclusions maybe are not only the same,

1:53.1

but have even strengthened. And through the process of learning more and coming across more

...

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