666: Mastering Nutrition: How to Think Clearly About Diet in a World of Conflicting Advice with Christopher Masterjohn
Legendary Life | Transform Your Body, Upgrade Your Health & Live Your Best Life
Ted Ryce
4.8 • 848 Ratings
🗓️ 16 March 2026
⏱️ 58 minutes
🧾️ Download transcript
Summary
Nutrition debates today often feel more ideological than scientific. One of the biggest examples is the ongoing controversy around seed oils, where strong opinions exist on both sides but clear understanding is often missing.
In this episode, Ted speaks with nutrition scientist Christopher Masterjohn to explore the history and research behind seed oils, cholesterol, fatty liver disease, and oxidative stress. They also discuss why nutrition debates become polarized, how choline intake influences liver health, and why metabolic markers like glucose and lactate can offer useful insights into personal metabolism.
If you want a deeper, more nuanced understanding of one of the most debated topics in nutrition—and practical ways to think about your own diet—this conversation will challenge assumptions and expand your perspective. Listen now.
Today's Guest
Christopher Masterjohn
Christopher Masterjohn is a nutrition scientist with a PhD in Nutritional Sciences. His work focuses on metabolism, micronutrients, and the biochemical mechanisms that influence long-term health. Through his research, writing, and educational platforms, he helps people understand how diet, metabolism, and lifestyle interact to shape metabolic health.
Connect to Christopher Masterjohn
Website: https://www.chrismasterjohn-phd.com
Instagram: @chrismasterjohn
Substack: Harnessing the Power of Nutrients
YouTube: @chrismasterjohn
Podcast: Mastering Nutrition Podcast
You'll learn:
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Why seed oils became widely promoted—and why the science remains controversial
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How polyunsaturated fats influence oxidative stress and long-term disease risk
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The overlooked role of choline in preventing fatty liver and supporting metabolic health
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How tracking glucose and lactate can provide deeper insight into metabolic function
Chapters:
00:00 Introduction
02:43 Seed Oils Defined
04:20 PUFAs Oxidation Risks
05:53 Heart Disease History
07:51 Trials Cancer Concerns
10:49 Null Hypothesis Debate
18:34 Choline Fatty Liver
33:50 Added Oils and Real Life
39:40 Muscle Over Fat Loss
44:24 Accidental Deficits Example
46:14 Coaching Psychology Nuance
50:59 Lactate and Mitochondria
56:11 Wrap Up and Where to Find
Transcript
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| 0:00.0 | I think that most people probably shouldn't be adding too much oil to their food. |
| 0:11.0 | I do think that there's a very individual response to different macronutrients. |
| 0:18.0 | So I know that from the perspective of an intentional modification of body |
| 0:23.5 | composition, which is kind of dominates the fitness space, generally added oils to negative. |
| 0:30.9 | I do think that that is a good default, but I personally would say that people should look at how their diet is impacting their glucose and lactate. |
| 0:44.3 | And I, like waking morning fast did glucose and lactate. |
| 0:48.3 | Before we start, I want to tell you this. |
| 0:52.3 | If you're waiting for your life to slow down before you take control of your health and your body, |
| 0:57.0 | it's not happening. |
| 0:59.0 | Life doesn't slow down. |
| 1:01.0 | There's always going to be another deal, another deadline, another trip, |
| 1:06.0 | another fire to put out, another reason to put it off. |
| 1:10.0 | So either 2026 is the year you finally lead yourself, |
| 1:14.9 | the way you lead your business, or it's just another year of excuses. And if you're done negotiating |
| 1:21.8 | with yourself, go to lean after 40.com and see if you qualify. Your business doesn't tolerate inconsistency and your |
| 1:32.0 | body shouldn't either. If you're over 40, the best time to get in shape was decades ago. |
| 1:38.1 | There's only now. Take action. Now let's get back to the show. |
| 1:44.0 | Welcome to the legendary life podcast, where it's all |
| 1:47.5 | about taking control of your health, losing fat, transforming your body, and living the life you |
| 1:52.9 | deserve with celebrity fitness trainer and longevity enthusiast Ted Rice. Chris Master John, |
| 2:00.5 | it's been several years, but really excited to have you back on the show. |
| 2:04.4 | Thanks for having me here. Appreciate it. Good to be back. Yeah. And yeah, I recently saw you on Joe Rogan, |
... |
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