Jason Fung
Jason Fung is a Canadian nephrologist and author whose work focuses on obesity, type 2 diabetes, intermittent fasting, and metabolic health. He is best known for The Obesity Code, The Diabetes Code, and The Complete Guide to Fasting, which helped popularize fasting-centered approaches to weight loss and insulin resistance.
Biography & Author's Journey
Jason Fung is a Canadian nephrologist and author whose public work grew directly out of clinical frustration. He grew up in Toronto, entered the University of Toronto at 17 to study biochemistry, completed medical school there by 23, trained in internal medicine, and then pursued nephrology at the University of California, Los Angeles before returning to Toronto in 2001. In practice, he repeatedly saw type 2 diabetes leading patients toward kidney disease, and that experience became the central turning point of his career. By the mid-2000s, his reading in nutrition research and his dissatisfaction with standard diabetes care pushed him toward a sustained interest in obesity, insulin resistance, and the role of diet in chronic disease. ((https://www.thefastingmethod.com/my-journey/))
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Popular Books
The Diabetes Code
Jason Fung
Groundbreaking guide to reversing type 2 diabetes through proper diet and intermittent fasting, challenging conventional medical wisdom.
The Cancer Code
Jason Fung
Revolutionary approach to understanding cancer, focusing on insulin dysregulation and lifestyle changes to create an inhospitable environment for cancer cells.
The Obesity Code
Dr. Jason Fung
Scientific approach to understanding and managing obesity.
The Diabetes Code
Jason Fung
Groundbreaking guide to reversing type 2 diabetes through proper diet and intermittent fasting, challenging conventional medical wisdom.
The Cancer Code
Jason Fung
Revolutionary approach to understanding cancer, focusing on insulin dysregulation and lifestyle changes to create an inhospitable environment for cancer cells.
The Obesity Code
Dr. Jason Fung
Scientific approach to understanding and managing obesity.
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The Sustainable Weight Loss Shift
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Community Voices
"Jason Fung is a nephrologist and a New York Times-bestselling author of many books including The Obesity Code and The Diabetes Code"
— BBC Science Focus
"Jason Fung has a gift for explaining complex science clearly and delivering it with the perfect, telling anecdote"
— Nina Teicholz
"Jason Fung nails it again in The Hunger Code"
— Dan Buettner
"Jason Fung, MD uses Ockham's razor to simplify the management of type 2 diabetes"
— Family Medicine
"With rich scientific support, Dr. Jason Fung has sounded a clarion call to re-evaluate how we view and treat diabetes"
— Benjamin Bikman
"Dr. Jason Fung has done it again"
— Steven R. Gundry
"Dr. Jason Fung presents a novel, comprehensive model of obesity that delivers unexpected insights into healthy eating"
— Indian Journal of Medical Sciences
"Dr. Jason Fung's explanation of insulin resistance and the accompanying insulin model of obesity is original, brilliant and game changing"
— Zoë Harcombe
"Dr. Jason Fung triumphs in explaining the core underlying causes of obesity and manages to simplify it in a way that anybody can understand"
— Sam Feltham
From Columbia University alumni built in San Francisco
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
From Columbia University alumni built in San Francisco
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
