Metabolic Flexibility and How the Lumen device can help with Fasting | Jason Fung
Thanks to Lumen for sponsoring! Go to to get 15% off your Lumen today.
Hi, I'm Dr. Jason Fung. Today, we’re diving into metabolic flexibility – what it is, why it matters, and how you can measure it with a simple handheld device called Lumen. This video is sponsored by Lumen, and you can get a discount with the code below!
Metabolic flexibility is the ability of your body to switch between burning glucose and fat for energy. This is crucial for adapting to different energy needs and maintaining good health. With the Lumen device, you can easily measure your metabolic flexibility at home by tracking the carbon dioxide you exhale.
In this video, we’ll cover:
Metabolic Flexibility – Understand how your body switches between burning carbs and fat.
Lumen Device – Learn how this device measures your respiratory exchange ratio (RER) to determine what fuel your body is using.
Importance of Metabolic Flexibility – Discover why being metabolically flexible is essential for preventing obesity, insulin resistance, and diabetes.
Scientific Studies – Explore research showing how Lumen can help diagnose and improve metabolic flexibility.
Practical Tips – Get advice on using fasting and diet adjustments to enhance your metabolic health.
Whether you're looking to optimize your metabolism or learn more about metabolic health, this video has valuable insights for you. Don’t miss out!
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if you want to try the lumen for yourself, You can get a 15% off code : www.lumen.me/fung
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▶️ Timestamps / Chapters
00:00 Intro
00:30 Metabolic flexibility
01:53 Feeding – Insulin Rises Stores Sugar and Fat
04:23 How much Glucose Burning depends on
07:00 Response to glucose load ( carbohydrates )
07:56 Obesity Facts
08:48 Lumen help fasting
11:00 Outro
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📌 BOOKS:
👉 The Obesity Code – Reviewing underlying physiology of weight loss and how low
carb diets and fasting can help. ?…
👉 The Diabetes Code – Reviewing how type 2 diabetes is a reversible disease and
dietary strategies. ?…
👉 The Cancer Code – Scientific exploration of how cancer develops –
?…
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📌 YouTube Medical Lectures (for specialist physicians):
▶️ The Roots of the Obesity Epidemic: https:
//www.youtube.com/watch?v=q8BGYhreaco&t=0s
▶️ Therapeutic Fasting – The Two Compartment Problem: https:
//www.youtube.com/watch?v=ETkwZIi3R7w&t=0s
▶️ Does Calorie Counting work?:
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#MetabolicFlexibility #Lumen #wightLoss2024 #jasonfung #drjasonfung #drfung #fung #nutrition #diet #health #fasting #intermittentfasting
Hi sir
Thank you Dr.Fung
Posted 20 seocnds ago!? Wow I’m so early 😅 I’m from Scarborough, Dr.Jason Fung – small world I must say. Thank you for the work you do!
I was actually considering this, I just can’t figure out what works without the subscription
If you have limited CO2 diffusion capacity due to interstitial lung disease will this device still provide useful feedback?
Been looking at getting one of these but it’s so expensive on top of the monthly subscription.
I’ve been using Lumen (and fasting) for a few months now and am down 30kgs (66 pounds) since I started. Really insightful tool.
Wow🎉that’s awesome!! Well done!
Thank you for the insight. This device and information is very helpful
Dr. Fung is my personal hero! He saved me from MANY diseases & and have outlived my Mother’s age when she contracted cancer! Thank you Sir!❤
The Lumen Device, just in time for Severance Season 2
Can’t afford it
Prof Bikman just did a video on this yesterday 😊 but didnt recommend any products. If these tools like Lumen, CGM etc were more affordable we could all be healthier and Metabolically flexible.
Hey, Doctor fung.Yeah I tried to do Keto 3 years because I’m a type, 2 diabetic and wanted to become more healthy.
Unfortunately, I ended up with ketoacetosis Which never having it before.I thought it was a Stomach flu because I couldn’t keep water and food down As.
Well as drinking.
Distilled water with hemalayan salt in it Which apparently wasn’t enough because it was depleting. My minerals, so is a double Hit to the body. I’m just curious with fasting.Put me in these same situations. Because I would like to be able to lose some of this fat. I’ve always had a pot belly It.
Seems to be a family trait as well as type to diabetes I just had a Quintuple bypass surgery they also took an artery from my leg. And put it in my heart in march last year. I’ve been watching you for quite a few years because of your logical thinking and thinking outside the box approaches. The most people in your field do not do. Thank you for reeducating yourself on a continuous basis.So you can better help people with up the date solutions.
❤❤❤🙏🙏🙏
At one time I was going to buy a Lumen device but decided on the blood ketone meter and sticks instead due to greater accuracy, unless these now have higher accuracy than 2 years ago? I know a lot of people don’t want the sticks to draw blood and choose these instead as they are much cheaper to use too.
What about an interview with Dr Ken Barry. Both of your things promote autophagy
So very interesting. I have lost 77 Lbs thanks to your guidance. Sadly as Lumen is an American company, the cost for Canadians gets too high for may of us to buy. Between exchange rates and duty it is sadly outside of my budget.
Why not use Keto strips?
Might be helpful 👍