Uploaded November 2025 | Updated September 2026, 1 week ago
Full Show Notes: bengreenfieldlife.com/podcast/drandrew
Even elite athletes can look “fit” on the outside—yet show blood sugar patterns that scream prediabetic on the inside.
Dr. Andrew Koutnik's research proves it. His groundbreaking work on ketogenic adaptation, insulin dynamics, and performance shows that real fitness isn’t about biceps or six-pack abs—it’s about metabolic health.
In this episode, we dig into the science of metabolism, disease, and human adaptation—through one of the most eye-opening case studies you’ll ever hear:
- How type 1 diabetes rewires the body’s relationship with food, insulin, and performance
- Why natural sweeteners like stevia, monk fruit, and allulose are safer choices than artificial ones—and how allulose, in particular, may uniquely support blood sugar control
- How modern tech like continuous glucose monitors and insulin pumps is revolutionizing glucose management—yet still can’t fully replicate the body’s natural precision
- Why some elite athletes experiment with insulin for performance—and the dangerous reality behind that practice
- What his research reveals about ketogenic adaptation—and how a fat-fueled body can match or even outperform high-carb athletes once the body fully adapts
- How stable brain energy from ketones and lactate sustains endurance better than glucose alone
- What a decade of ketogenic research shows about thyroid, liver, kidney, and cardiovascular health—and why the data challenges mainstream assumptions
This podcast was so epic, we are already planning a part 2, so stay tuned!
Ad-free on LIFE Network: joinlifenetwork.com
Ben Greenfield Life Website: bengreenfieldlife.com
Ben Greenfield Life Podcast: bengreenfieldlife.com/podcast
Ben Greenfield Books: shopbengreenfieldlife.com/collections/books
Instagram instagram.com/bengreenfieldfitness
Facebook facebook.com/BGFitness
X twitter.com/bengreenfield
TikTok tiktok.com/@bengreenfield
00:00 "Diabetes: Beyond Type 2"
07:17 "Autoimmune Risks: Lifestyle & Environment"
11:04 Food Choices and Chronic Disease
20:58 "Managing Type 1 Diabetes Simplified"
26:16 "Type 1 Diabetes Management Tools"
28:19 "How the Body Processes Glucose"
32:42 "Insulin's Dual Role: Muscle vs. Fat"
38:22 "Ketogenic Diet and Athletic Performance"
46:04 "Blood Glucose Regulation Boosts Performance"
53:35 "Brain Fuel: Lactate and Ketones"
55:50 "Low-Carb Diet & Glycemic Control"
01:03:40 "Long-Term Effects of Ketogenic Diet"
01:09:47 "Health Insights from Extremes"
01:12:35 Optimizing Mind, Body, Spirit
Full Show Notes: bengreenfieldlife.com/podcast/drandrew
Even elite athletes can look “fit” on the outside—yet show blood sugar patterns that scream prediabetic on the inside.
Dr. Andrew Koutnik's research proves it. His groundbreaking work on ketogenic adaptation, insulin dynamics, and performance shows that real fitness isn’t about biceps or six-pack abs—it’s about metabolic health.
In this episode, we dig into the science of metabolism, disease, and human adaptation—through one of the most eye-opening case studies you’ll ever hear:
- How type 1 diabetes rewires the body’s relationship with food, insulin, and performance
- Why natural sweeteners like stevia, monk fruit, and allulose are safer choices than artificial ones—and how allulose, in particular, may uniquely support blood sugar control
- How modern tech like continuous glucose monitors and insulin pumps is revolutionizing glucose management—yet still can’t fully replicate the body’s natural precision
- Why some elite athletes experiment with insulin for performance—and the dangerous reality behind that practice
- What his research reveals about ketogenic adaptation—and how a fat-fueled body can match or even outperform high-carb athletes once the body fully adapts
- How stable brain energy from ketones and lactate sustains endurance better than glucose alone
- What a decade of ketogenic research shows about thyroid, liver, kidney, and cardiovascular health—and why the data challenges mainstream assumptions
This podcast was so epic, we are already planning a part 2, so stay tuned!
Ad-free on LIFE Network: joinlifenetwork.com
Ben Greenfield Life Website: bengreenfieldlife.com
Ben Greenfield Life Podcast: bengreenfieldlife.com/podcast
Ben Greenfield Books: shopbengreenfieldlife.com/collections/books
Instagram instagram.com/bengreenfieldfitness
Facebook facebook.com/BGFitness
X twitter.com/bengreenfield
TikTok tiktok.com/@bengreenfield
00:00 "Diabetes: Beyond Type 2"
07:17 "Autoimmune Risks: Lifestyle & Environment"
11:04 Food Choices and Chronic Disease
20:58 "Managing Type 1 Diabetes Simplified"
26:16 "Type 1 Diabetes Management Tools"
28:19 "How the Body Processes Glucose"
32:42 "Insulin's Dual Role: Muscle vs. Fat"
38:22 "Ketogenic Diet and Athletic Performance"
46:04 "Blood Glucose Regulation Boosts Performance"
53:35 "Brain Fuel: Lactate and Ketones"
55:50 "Low-Carb Diet & Glycemic Control"
01:03:40 "Long-Term Effects of Ketogenic Diet"
01:09:47 "Health Insights from Extremes"
01:12:35 Optimizing Mind, Body, Spirit
