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Insulin & Weight Gain Go Hand in Hand | Review of The Obesity Code Book (Part 3 & 4)

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pulling out The Obesity Code book

🚨WARNING: SPOILERS AHEAD! 🚨

WOWEEE! The Obesity Code just keeps on getting better and better! Even for a slow reader like me, it’s a page-turner filled with a lot of lightbulb a-ha moments! I honestly thought it couldn’t get better than last week’s assignment but boy was I wrong. Read on to find out what this week’s assignment covered.

Have you signed up for our Hip2Keto Book Club? If not, you are seriously missing out!


So… let’s dive into the Week 2 reading assignment:

Week 2

Part 3: A New Model of Obesity – Chapters: 6, 7, 8, 9, 10
Part 4: The Social Phenomenon of Obesity – Chapters: 11, 12, 13

Part 3 of The Obesity Code goes in-depth with explaining how cortisol, insulin, stress, leptin, and sleep all play major roles in weight loss and weight gain. As someone who maybe gets about four hours of sleep tops every night, it sure was an eye-opener. “A single night of sleep deprivation increases cortisol levels by more than 100 percent.” 😱

And if you haven’t gotten that far, increased cortisol levels = weight gain, so yes, we all need to get more sleep. Anyone else feel like they’re going to have to put their phone in another room in order to achieve this? 🙋🏻‍♀️

The discussion regarding insulin levels and the correlation between weight gain with elevated levels is sort of mind-boggling when you think about it. Type 2 diabetics are often given insulin to control their diabetes, but according to Dr. Fung’s research, it’s also contributing to rapid weight gain among those individuals. Part 3 also talks about the Atkins low carb revolution and the studies of Dr. Robert Atkins. I think we’ve all either tried or know someone that has tried the Atkins diet at some point.

Part 4 tackles food issues, poverty and childhood obesity, and how they play a role in the obesity epidemic. The underlying message that seems to be prevalent in both parts of this week’s assignment is that insulin is really tied to it all. The ideas he shares about passing along obesity to our children before they’re even born is absolutely food for thought and makes a lot of sense in the way he explains it.

Key takeaways from The Obesity Code, Part 3 & 4:

quote from obesity code book

Here are some of my favorite quotes from this week’s assignment. To be honest, I really had a hard time choosing just which ones to include, every page is filled with so much amazing (and often mind-blowing) information!

“Excess calories did not cause obesity, so reduced calories could not cure it. Lack of exercise did not cause obesity, so increased exercise could not cure it. The false gods of the caloric religion had been exposed as charlatans.”


“Obesity develops over decades. Yet hundreds of published studies consider only what happens to us in less than a year. Thousands more studies last less than a week. Still, they claim to shed light on human obesity.”


The Obesity Code book opened with sentence highlighted

“OBESITY IS NOT caused by an excess of calories, but instead by a body set weight that is too high because of a hormonal imbalance in the body.”


“Insulin is a key regulator of energy metabolism, and is one of the fundamental hormones that promote fat accumulation and storage.”


“Insulin is a storage hormone. Ample intake of food leads to insulin release. Insulin then turns on storage of sugar and fat. When there is no intake of food, insulin levels fall, and burning of sugar and fat is turned on.”


“Increased calories in and decreased calories out (eating more and moving less) does not cause obesity, but is instead the result of obesity.”


“Drugs that raise insulin levels cause weight gain. Drugs that have no effect on insulin levels are weight neutral. Drugs that lower insulin levels cause weight loss.”


“A recent study suggests that 75% of the weight-loss response in obesity is predicted by insulin levels. Not willpower. Not caloric intake. Not peer support or peer pressure. Not exercise. Just insulin.”


“The undeniable fact remains that excess cortisol causes weight gain.”


reading chapter 18 of The Obesity Code book

Are you ready for Week 3? Here’s your assignment!

Part 5: What’s Wrong with our Diet? – Chapters: 14, 15, 16, 17, 18

If you’ve already finished week one and two, continue on with our week 3 assignment which is roughly around 55 pages. If you’re a little late to the game, no worries, just catch up when you can, we’ll have all the information here waiting for ya! This book is a game-changer for anyone, even those not living a keto lifestyle.

Feel free to post your thoughts in the comment section of this post for the week two assignment or in our exclusive Hip2Keto Facebook GroupLet us know your biggest takeaways from each week’s chapters and chat with other Hip2Keto readers to compare notes.


Still don’t have The Obesity Code book yet?

You can grab the paperback book, the Kindle version, or the Audible version of the book to join in on the fun!


Collin and Erica discussed our Week 1 reading assignment of The Obesity Code in this Facebook live video! Be sure to watch it, and then let us know your key takeaways.

Join The Discussion

Comments 8

  1. Marinova

    I have really enjoyed the book so far, but I did find a bit of an issue in this section. Many of the studies he cited on childhood obesity are on gradeschool children, yet he extended many of his conclusions to babies even in utero. Babies were meant to get sugar, breast milk contains sugar and it tastes sweet. Anthropologically speaking, the normal age of human weaning based on dental evidence is between four and six years of age. On top of this, babies eat/nurse around the clock, which means that they ingest sugar around the clock and have for millennia. This means they will always have insulin in their blood, and they were meant to. In fact I recently read a study that suggested the gut flora of mothers as well as their newborns changes such that carbohydrates are more easily digested and absorbed. It probably has something to do with the rapid brain growth that babies sustain, but babies and toddlers likely have a way of compensating for this round the clock sugar ingestion and subsequent insulin, so I don’t believe that his conclusions can extend to those age groups. In those populations, I believe it is not so simple.

    • Jennifer (Hip Sidekick)

      Thanks, Marinova! I really appreciate your thoughts. They are great and very thought-provoking for me.

  2. Tee

    Anyway you can post a link directly to the live when it is on? Two weeks now not able to find where to go and I keep going in circles and miss the live. Thanks

    • Angie (Hip2Keto Sidekick)

      Hi Tee! I’m so sorry you missed it! We do share a link directly to the group. It’s not shared on the event invite itself. The live is always started on the the Facebook page & then shared to the community. You might be able to see it easier from the Facebook page. Hope this helps♥

  3. Michelle alston

    I was doubtful about this book. I have read a million books about losing weight, but this is the FIRST that didn’t have a gimmick. It is stripped of the glamour and gets straight to the point. I started fasting when I started reading this. For the first time in years I don’t have bloat…

    • Angie (Hip2Keto Sidekick)

      Hi Michelle! This is so wonderful to hear. I do feel like it hits the nail on the head. So glad you decided to read it with us❤

  4. Kathy

    Got the book to read along with HIP2KETO. Couldn’t put it down and finished it in three days! This book makes sense…soooo much sense! I have never fasted much, but I am going to begin incorporating that into my keto lifestyle as fasting definitely seems to be the key to overcoming insulin resistance. I am not overweight, normal BMI, no chronic health problems. BUT…I want to FEEL good and reduce my chances of future problems and live a healthier life. Low insulin, low cortisol, fasting for the WIN! Life changing book…really.

    • Amber (Hip Sidekick)

      Yay! SO happy to hear you loved it so much you couldn’t put it down! Super glad you found it so informational and inspiring! Thanks a ton for sharing with us, Kathy! 🙌

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