What Happens if You Fast for 100 Hours (Hour by Hour Breakdown!)
Dr. Jockers Functional Nutrition
Dr. Jockers
4.8 • 850 Ratings
🗓️ 8 January 2026
⏱️ 30 minutes
🧾️ Download transcript
Summary
In this episode, Dr. David Jockers breaks down the powerful effects of fasting for 100 hours, including immune system reset and fat-burning benefits. Learn how your body taps into stored body fat, including visceral fat around your organs, and the remarkable regeneration process that happens as a result.
Discover how fasting activates stem cells, particularly in slower-healing areas like joints and cartilage, and how this process can improve muscle and joint function. Dr. Jockers also explains how extended fasting can lead to a dopamine reset, enhancing your sensitivity to rewards and reducing cravings.
Find out how autophagy, or "self-eating," ramps up as you fast, breaking down old, damaged proteins and cells to promote longevity. You'll also gain insights into the benefits of fasting for brain health, with ketones fueling mental clarity and reducing brain inflammation.
In This Episode:
00:00 Introduction to Immune System Reset and Fasting
00:18 Podcast Welcome and Episode Overview
00:51 Benefits of Extended Fasting
03:47 Hour-by-Hour Breakdown of a 100-Hour Fast
16:31 Common Fasting Questions Answered
22:42 Conclusion and Final Thoughts
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"When we fast for 100 hours, we trigger a complete immune system reset, which can significantly reduce chronic inflammation and even lower the risk of autoimmune diseases."
~ Dr. Jockers
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Transcript
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| 0:00.0 | The more immunosin essence we have, the higher the rate of chronic inflammatory conditions, |
| 0:05.3 | autoimmune disease, and cancer. |
| 0:07.3 | So we get this full immune system reset at three days. |
| 0:10.4 | Now, what happens at four days? |
| 0:11.9 | If we keep that fast going, we get a surge in stem cells throughout the body. |
| 0:16.8 | In particular, well, welcome back to the podcast. |
| 0:20.1 | Got a great episode today, all about what happens |
| 0:22.6 | if you fast for 100 hours. I do an hour by hour breakdown. You guys are going to be blown away |
| 0:28.1 | and what's actually happening in your body, the deep cellular healing, the fat burning, the brain |
| 0:33.6 | regeneration that takes place when you undergo fasting. Now, of course, I'm an advocate of |
| 0:38.4 | feast famine cycling. So I don't recommend too much fasting. I recommend also that you eat and you |
| 0:44.2 | eat very well and you eat really nutrient dense foods. That's what I'm all about here on the |
| 0:49.1 | functional nutrition podcast. However, extended fasting can be very powerful when it comes to healing and |
| 0:56.9 | regenerating your body. And a lot of times in the beginning of the year, people undergo a |
| 1:02.6 | four or five day fast. And 100 hours is roughly, you know, in that time span, a little over four |
| 1:07.2 | days. And so I'm going to break this down so you can understand what's actually happening in your body or maybe a friend or family member's body who's doing this. And of course, share this episode with them. If you know anybody that's doing this or interested in doing it, share this episode with them. I give a lot of really good pointers, helpful tips for fasting and having success with it. I do a Q&A at the end. So you guys are going to enjoy this. |
| 1:29.3 | And if you're looking for health coaching to help you reach your health goals this year, |
| 1:34.0 | check out Dr.jokers.com. Check out our long distance coaching tab on the website. We've got an amazing |
| 1:41.5 | naturopath and health coach, Dr. Yvonne and Tara that work with people |
| 1:46.0 | all over the world with a wide variety of health conditions and help customize and |
| 1:51.4 | personalize health plans to help them reach their health goals. |
| 1:54.9 | Amazing results that they're seeing on a regular basis. |
... |
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