I tried the 5 day modified fast. Surprisingly easy.
I’m sharing my personal experience with the fasting mimicking diet (FMD). I’ll break down how it works, the science behind it, and whether it’s worth trying.
I’ve been talking about fasting since 2014, but one of the few researchers exploring
fasting at the time was Dr. Longo in California. He discovered that fasting triggers
beneficial repair processes in the body, but fasting for five days can be tough. That’s
where the fasting mimicking diet comes in — it allows you to eat small amounts of
specially designed foods while still keeping your body in a fasting state.
�� What You’ll Learn in This Video:
✅ How the fasting mimicking diet works and the science behind it
✅ Why lowering nutrient sensors like insulin and mTOR matters for health
✅ Health benefits shown in studies on weight loss, diabetes, cancer, and more
✅ My personal experience – what worked, what didn’t, and how it felt
✅ Pros: Structured, easier than water fasting, good taste, and convenient
✅ Cons: It's pricey, but it replaces five days of meals
I’ve done water fasts before, and they’re not easy — especially on days 3 and 4. But
the FMD made it much more manageable since you’re still eating a bit of food. Plus,
it’s less stressful and more socially convenient when eating with family.
I’ll also walk you through exactly what’s included in the FMD kit — from soups and
bars to teas and vitamins — and share my thoughts on the taste and overall
experience.
If you’re curious about fasting or looking for an easier way to experience the benefits
of fasting, this video is for you!
�� Watch now and let me know your thoughts in the comments!
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▶️ Timestamps/Chapters
00:00 – Intro
00:20 – Fasting Mimicking Diet
01:27 – How can a 5 day fast be made easier?
03:38 – Why Mimic Fasting? Why not just Fast?
05:52 – Extended fast on FMD: less food ‘obsession’
06:55 – Disadvantage (Fasting Mimicking Diet)
7:53 – Prolon (Promoting health and longevity)
08:28 – 5-day program (Prolon)
=============================
�� BOOKS:
�� The Obesity Code – Reviewing underlying physiology of weight loss and how lo
carb diets and fasting can help. ?…
�� The Diabetes Code – Reviewing how type 2 diabetes is a reversible disease an
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: // • The Obesity Epidemic, Explained
▶️ Therapeutic Fasting – The Two Compartment Problem:https: // • Fasting and
Weight Loss – Solving the…
▶️ Does Calorie Counting work?: • Why Calorie Counting rarely leads to …
▶️ Two Big Lies of Type 2 Diabetes: • Two Big Lies about Type 2 Diabetes
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#Fasting #FastingMimickingDiet #DrJasonFung #WeightLoss #IntermittentFasting
Thanks for all you do
Oh my. I just started my 7 days fast. 😊
👍 nice
Started a 5 day one too. Go us!
Is it just water fasting?
I started a 5-day fast today! 🧡
Dr. Jason Fung, I’ll stick to your Intermittent Fasting instead. Lost gradually in a healthy pace 98 pounds in two years, which also included a Silver Sneakers exercise class 4 days a week. My lab results at my annual physical were significantly improved. Plus, once started, your intermittent fasting is easy to commit to and stick to. Thank you Dr. Fung.
Same
That’s amazing well done!!!
I appreciate your work. Bought your book.
This is interesting, but not my scene. For me, commitment is like spiritual weight-lifting. In or out. Do it or don’t do it, but don’t do it half way. So I fast or I don’t fast. I find that simpler is easier. And cheaper, too. 😉
Yay! You got your channel back!
What happened?
He was hacked.
@ Thank you. How awful. 🙁
There are different doctors saying many things for publicity and money…but from the last 7 years I follow only you because you are doing service VOLUNTARILY
The two disadvantages listed are huge. People are so afraid of the slightest discomfort that they can’t endure a short term period of adaptation to reap the long term benefits. Instead they’ll pay extra or compromise other aspects of their health with high processed food. A healthy lifestyle shouldn’t come out of a box
It doesn’t have to come out of THIS box. You can very easily replicate it with your meals/soups as long as you understand the philosophy of the Fasting mimicking diet.
@@komalthecoolk In that case it is not “THE Fasting Mimicking Diet” (Prolon) but “A” fasting mimicking diet. Prolon is prescribed, and therefore has few if any variables from person to person.
And by prescribed I mean “confined within bounds”. But yes, as a diet in hospitals it is also “prescribed”.
My main goal with extended fasts is to reduce chronic pain. A “fasting mimicking” plan reduces the benefit in this aspect. I also have very little highly processed “foods”. This plan not only contains highly processed “foods” but also a ridiculous amount of packaging. A waste.
And the cost? Even for a hospital diet I’m sure a whole food plan would be better health wise and cost wise for patients.
Yes. I’d rather the recipes of a fasting mimicking diet where I am creating from whole foods as needed. The only thing that looked like real food was the olives.
How about fasted snacks from Mindy Pels? She likes 1/2 an avocado, or 1 T of nut butter, or even a hard boiled egg. Sh has a list. She says that these foods won’t pull you out of ketosis if they are just “one” and to get you over the hump. Getting people into fasting is probably easier if they eat low carb for a couple of days. Then it’s a breeze. This is frankenfood.
@@ShakeMyWay I completely agree. I don’t snack, but if I did, your suggestion of 1/2 an avocado, homemade nut butter, or hard boiled egg is a good one. A bit of leftover meat or fish, homemade yogurt or kefir would also be good.
We’re so grateful for your honesty. You keep it simple & accessible to everyone. Love your books which are my always handy go to’s when I take a quiet moment to myself. Many, many thanks.
I did it though no need to pay $175-225. The macros are easy to find online and I had an ai tool design it for me using easy to source, unprocessed foods. After feeling cold for 3 days and starting to feel “frail” and weak I quit. This is after being very low carb, back and forth with keto for the past 3 years. It took nearly a week to regain my strength. Could be because I am 75 but that would be good info to know, about older people and fasting!
I wouldn’t spend that kind of money either. No need.
Never, ever.😢
Thank you, Dr. Fung. I recall hearing when this idea first came out that it was helpful for those undergoing cancer treatments. 3 days of water fasting before and after chemo or radiation left the defective cancer cells more vulnerable to the treatment. The healthy cells were able to sort of “shut down” during the fast and able to bounce back after refeeding without having been damaged by the treatment. Chemo and radiation are destructive for all cells – not just cancer. This diet allows folks who are too ill to do a 3 day water fast get the same benefit.
It’s easier to fast completely than to eat a little bit. Eating a little bit makes one more hungry, so I would stick with intermittent fasting. Thank you for all your motivational videos, Dr Fung.
Absolutely. This is why when I did OMAD for three months my meal was at 5 pm and NEVER earlier in the day.
What does Omad mean? Thank you in advance
@ OMAD is “one meal a day”. Basically a type of time-restricted eating or intermittent fast.
Everyone has a different metabolism, great it worked for some, it’s all trial and error
Agreed. My water fasts are easier than dieting and my dry fasts are even easier than the water fasts. Keep it simple!
I remember a time, years ago, when our good Dr. extolled the time benefits of not worrying about meals. Especially during the work day. Here we have a fast that requires 3 meals a day to be eaten on a schedule including desserts? Just the thought of it sounds like a bother. I do appreciate we’re advancing new options for different people with different needs seeking health.
Is it 3 meals a day? My understanding is that Prolon is a one meal a day “food box” for five days. The daily caloric count depends on the day number. If it is multiple meals a day, then the program is even worse than I thought.
Your videos inspired me to try intermittent fasting. I lost over 160 pounds as a result, now at 140 pounds. Thank you Dr. Fung
Good job , we weigh exactly the same
But I’ve never lost any weight my doctor told me I was obesse and I needed to be 115 pounds scary
I found the weight 😎
damn thats impressive
I’m doing a pretty extreme fasting regimen and it’s been amazing. I’m down 20lbs over the last 3 weeks and unexpectedly my eyesight is improving! I nutrition load with fruit and fish, eggs, & beef. Then I water fast for 72 hours, another nutrition load, then 72 hrs of dry fasting. Bread and refined sugar was only difficult to avoid the first few days before what I was craving was high fat meat and water-filled fruits like bell peppers and watermelon, oh, and liver and cherries: delicious!
I’d love to hear more about this regimen
I have been doing Prolon for 10 years, every 3 months. A few months ago I got the latest version that definitely had different ingredients from the older version. I never had any tummy issues or problem sticking with the 5 day program until this new version. It must be the addition of the hickory root fiber and inulin that made me sick. I got so sick I after the second day I almost had to go to the hospital. I thought something was seriously wrong. As soon as I quit eating the food I was fine within two days. I tried to go back on it and the same thing happened. I will never try it again after getting so sick (twice). It saddens me because I really looked forward to it. The other thing that was maddening is I email the company to tell them what happened to me and I never heard back. I tried to contact them again and heard nothing. So not only are they using ingredients that make you sick, they don’t stand by their product. Stay away from Prolon is my advice. Sorry Dr. Fung, I’ve been watching you for years and you have really helped me but in this case I need to disagree.
Both of the ingredients you listed are problematic and cheap additions/replacements for less processed or whole ingredients. I think I’ll stick with intermittent fasting and fewer/less processed foods. Even if it was a better alternative, the cost is prohibitive for me. Thanks for sharing your experience.
@ I totally agree with you. I think when they reformulated they used cheaper ingredients which is a rip off because the price is still just as high. I’m surprised Dr. Fung is still endorsing the product; kind of disappointing.
Have my wife on a modified version of this diet for her chemotherapy. She was placed on palliative care with a huge tumor that shrunk by 80% in four months by limiting protein to 2-3 ounces at a time a few times a day in her window
No. Better just to actually fast. Most benefits and its free. This stuff is processed. Definitely brakes a fast. Your previous teachings have been too good for me to now believe the agenda being pushed on this video. Let down.
As Dr. Fung says, this fast does work. I have done it 5 times in the past year and every time lose significant weight and all my health indicators (glucose, blood pressure etc) normalize and become optimal (and I am pre0diabetic).
Mimicking is not the same as the real thing, baby.