Episode 124: Leptin Resistance and Insulin Levels, Fasting Length and Fat Burning, and More

Fast. Feast. Repeat. Intermittent Fasting For Life

Gin Stephens and Sheri Bullock

Health & Fitness, Alternative Health, Nutrition

4.8 • 1.1K Ratings

🗓️ 12 November 2025

⏱️ 52 minutes

🔗️ Recording | iTunes | RSS

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Summary

Welcome to this week’s episode of Fast. Feast. Repeat. Intermittent Fasting for Life, with Gin Stephens and Sheri Bullock.
To make a submission for the podcast, go to fastfeastrepeat.com/submit. We are a community-driven podcast, and we look forward to sharing your questions, success stories, non-scale victories, IF tweaks, motivational quotes (and more!) on each episode of the podcast.
Resources used in today’s episode: Fasting sweet spot graph: https://share.icloud.com/photos/030s2ptnQNkwyEnj3BvHnJNIg https://www.bertherring.com/not-hungry-vs-full-the-difference-can-cause-relentless-weight-gain/
To get the books, go to https://www.ginstephens.com/get-the-books.html. The second edition of Delay, Don’t Deny is now available in ebook, paperback, hardback, and audIo book. This is the book that you’ll want to start with or share with others, as it is a simple introduction to IF. It’s been updated to include the clean fast, a thorough description of ADF and all of your ADF options, and an all new success stories section. When shopping, make sure to get the second edition, which has a 2024 publication date. The audiobook for the second edition is also available now!
Want to learn more about BiOptimizer’s Magnesium Breakthrough? Visit www.bioptimizers.com/fastfeastrepeat and use code FFR15 to save 15% off any order.
Go to fastfeastrepeat.com to see Gin’s and Sheri’s favorite things, and to shop with us. Every purchase you make through links on our website help to support this podcast so we can keep bringing you episodes each week.
Are you ready to take your intermittent fasting lifestyle to the next level? There’s nothing better than community to help with that. In the Delay, Don’t Deny community we all embrace the clean fast, and there’s just the right support for you as you live your intermittent fasting lifestyle.
Connect with both Gin and Sheri in the community, as well as thousands of other intermittent fasters who are there to support you along your journey. If you’re new to intermittent fasting or recommitting to the IF lifestyle, join the 28-Day FAST Start group. After your fast start, join us for support in The 1st Year group. Need tips for long term maintenance? We have a place for that! There are many more useful spaces beyond these, and you can interact in as many as you like.
Visit ginstephens.com/community to join us. An annual membership costs just over a dollar a week when you do the math. If you aren’t ready to fully commit for a year, join for a month and you can cancel at any time. If you know you’ll want to stay forever, we also have a lifetime membership option available.
IF is free. You don’t need to join our community to fast. But if you’re looking for support from a community of like-minded IFers, we are here for you at ginstephens.com/community.

Transcript

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0:00.0	Welcome to Fast Feast Repeat, intermittent fasting for life. I'm Jen Stevens, author of the New York Times bestseller Fast Feast Repeat. And I'm Sherry Bullock, long-time intermittent faster and health and wellness advocate. Please keep in mind that this podcast is for educational and motivational purposes only and is not intended to provide medical
0:21.9	or diagnostic advice. Jen and I are not doctors, so make sure to check with your trusted
0:27.0	health care professionals before making changes, especially when it comes to any medical
0:31.4	treatments or medications. Whether you're new to intermittent fasting or an experienced intermittent
0:36.7	faster, tune in each week to get inspired, to learn, and to have some fun along the way.
0:45.8	Hi, everybody. We are so glad you're here today. Welcome to this week's episode of the Fast Feast, Repeat, Intermittent Fasting for Life podcast. How are you doing today, Sherry?
0:55.0	I'm doing fine.
0:56.7	Me too.
0:57.3	I'm doing great. I want to share something cool.
1:00.2	Sure.
1:00.7	That I just learned. Did you see that, actually it was SK, shared in the community this week, the Zoe episode with Dr. Andrew Jenkinson?
2:00.8	I saw that she shared it. I haven't had chance to watch it. Well, I listened to it. I was able to listen to it while I was in the sauna, and then while I was getting ready in the shower, and then when I was drawing my hair, it was so good. Dr. Jenkinson is a bariatric surgeon, and he likes intermittent investing, by the way. That's one of the things he likes. But I learned something that made my brain go aha. Like it was an aha moment, like never. Well, not like never before. I have a lot of aha moments in my life. But it connected to things. He was talking about weight set points, for example. And, you know, I've never been able to find any really good science about weight set points, never. But we know that our bodies tend to protect a certain weight. And I think that, I think I understand it now. And it has to do with leptin. Okay. Do you know a lot about leptin? I mean, yeah, I mean, I feel like I know a fair amount. Well, Lepton wasn't even discovered.
2:01.6	I looked this up.
2:04.4	It was not discovered until 1994.
2:05.9	Okay, yeah.
2:07.3	So they discovered it in 1994.
2:13.5	And then I remember hearing about it in the, I don't know, sometime after 2005,
2:16.6	because I know what house I was in when I was thinking about, I can picture myself thinking
2:17.7	about it in this one room of that house that we lived in.
2:20.5	And so they were talking about the idea that leptin, leptin is a hormone that lets you,
2:26.4	like your hypothalamus or something, know how much body fat is stored on your body.
2:30.3	And it's a feedback mechanism that our bodies have because it wouldn't be good for us to be
	...

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