Fat Burning Power of Fasting: 12 Hours, 24 Hours and 48 Hours Explained

Dr. Jockers Functional Nutrition

In this episode, Dr. Jockers breaks down exactly what happens inside your body during a 12, 24, and 48-hour fast. You’ll discover how these fasting windows affect fat burning, metabolism, and even your brain’s performance. The science behind it will show you why fasting is far more powerful than just skipping meals.

You’ll also learn how fasting lowers insulin, boosts growth hormone, and increases ketones—helping your body preserve muscle while burning fat. These shifts not only fuel your energy but also enhance mental clarity, creativity, and focus. The longer the fast, the deeper the benefits for your body and brain.

Beyond fat burning, fasting activates cellular repair processes like autophagy and stem cell production. These changes promote gut health, reduce inflammation, and support anti-aging at a deep level. By understanding these stages, you’ll be able to create a fasting routine that works best for your unique health goals.

In This Episode:

00:00 Introduction to Intermittent Fasting

03:20 The Science of Fasting: 12 to 14 Hours

08:40 The Science of Fasting: 16 Hours

14:03 The Science of Fasting: 20 to 24 Hours

17:43 The Science of Fasting: 3 to 5 Days

18:43 Fasting Strategies and Recommendations

20:39 Conclusion and Final Thoughts

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“Fasting isn’t just about skipping meals; it's a lifestyle that activates fat burning, boosts brain health, and reduces inflammation.”

~ Dr. Jockers

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