Ever wonder why fasting worked at first — then stopped? Or why you lost 80 pounds only to gain back 100?

In this mailbag episode, Dr. Emily Cooper, Mark Wright, and Andrea Taylor tackle the most misunderstood topics in metabolic health. From the harsh reality of fasting culture to the surprising metabolic challenges faced by normal-weight individuals, this conversation validates what you've been experiencing and explains the science behind it. You'll also hear why GLP-1 medications aren't just weight loss drugs, why your body might be fighting you even when you're doing everything right, and what happens when your job — like shift work or firefighting — disrupts your metabolism for years.

KEY TAKEAWAYS

• You can have metabolic dysfunction at a normal weight with what appear to be normal labs, for example, when insulin is over suppressed from chronic under-fueling or overexercising
• Fasting triggers the same biological adaptation as any restrictive diet and typically results in weight regain that's 22 percent higher than starting weight
• Food noise is biological, not psychological, and stems from an imbalance of hormones and neurotransmitters signaling nutritional insecurity
• GLP-1 medications may improve immune function because metabolic health and immunity are deeply connected
• Shift work and chronic sleep disruption can cause real metabolic damage by weakening leptin signals, increasing insulin resistance, and amplifying hunger hormones

NOTABLE QUOTE

"You can't trick your body. You have to have that foundational fueling in there." — Dr. Emily Cooper

Links & Resources

Podcast Home: fatsciencepodcast.com

Cooper Center for Metabolism: coopermetabolic.com

Resources from Dr. Cooper: coopermetabolic.com/resources

Join Our Community: patreon.com/cw/FatSciencePodcast

Submit Your Question: questions@fatsciencepodcast.com or dr.c@fatsciencepodcast.com

Fat Science is supported by the Diabesity Institute, a nonprofit dedicated to increasing access to effective, science-based metabolic care.

Disclaimer: This podcast is for informational purposes only and is not intended as medical advice. Please consult with a qualified healthcare provider for personalized recommendations.

Are you getting eight hours in bed but still waking up exhausted?

Dr. Emily Cooper shares groundbreaking findings from nearly 15,000 patient encounters at her metabolic clinic. The data reveals surprising connections between stress, eating frequency, sleep quality, and metabolic health — and why the number of hours you spend in bed doesn't tell the whole story.

KEY TAKEAWAYS

• Over 60% of patients reported trouble staying asleep, even when they got eight hours in bed
• Higher stress levels were associated with double the rate of low energy and significantly worse sleep quality
• Eating frequency matters — patients eating five times per day reported the best sleep and highest energy levels
• The sweet spot between meals is two to four hours — longer gaps were linked to sleep disruption and low energy
• Any amount of alcohol was associated with fragmented sleep, regardless of stress levels
• Nearly 65% of patients were not hydrating adequately throughout the day

NOTABLE QUOTE

"If your cortisol goes high, we can get the same effects that happen when we take steroids, which we know promote pre-diabetes, insulin resistance, weight gain." — Dr. Emily Cooper

Links & Resources

Podcast Home: fatsciencepodcast.com

Cooper Center for Metabolism: coopermetabolic.com

Resources from Dr. Cooper: coopermetabolic.com/resources

Join Our Community: patreon.com/cw/FatSciencePodcast

Submit Your Question: questions@fatsciencepodcast.com or dr.c@fatsciencepodcast.com

Fat Science is supported by the Diabesity Institute, a nonprofit dedicated to increasing access to effective, science-based metabolic care.

Disclaimer: This podcast is for informational purposes only and is not intended as medical advice. Please consult with a qualified healthcare provider for personalized recommendations.

Think squashing your post-meal glucose spike is the healthy thing to do? What if that flat line on your CGM is actually telling your brain you didn't eat — and slowing your metabolism as a result?

This week on Fat Science, Dr. Emily Cooper, Mark Wright, and Andrea Taylor open the mailbag to tackle listener questions from around the world — Australia, New Zealand, and across the U.S. They dig into hormone replacement therapy and metabolism, why your GLP-1 medication might be causing hair loss, what a normal blood sugar response actually looks like, and how lipedema differs from obesity. Dr. Cooper also revisits metabolic syndrome and why it's not outdated — just underutilized.

Key Takeaways

• Hormone replacement therapy isn't a reliable tool for improving metabolism — it's better suited for symptom relief and bone health in specific situations.

• Progesterone, which must accompany estrogen if you still have your uterus, can actually disrupt metabolism in some women — acting almost like a steroid.

• A flat glucose line after eating isn't the goal — your brain needs to see glucose go up to register that you've been nourished and keep your metabolism running.

• Hair loss on GLP-1 medications is more likely tied to nutrient deficiencies (especially iron and protein) than the drugs themselves.

• Lipedema is a disease of the fat tissue itself — separate from obesity — and tirzepatide may help reduce the inflammatory symptoms even though it won't eliminate the fat deposits.

Notable Quote

"If your glucose is flat line, your brain's not very convinced that you ate much — and then you're not getting the metabolic benefit." — Dr. Emily Cooper

Links & Resources

• Podcast Home: fatsciencepodcast.com

• Cooper Center for Metabolism: coopermetabolic.com

• Resources from Dr. Cooper: coopermetabolic.com/resources

• Join Our Community: patreon.com/cw/FatSciencePodcast

• Submit Your Question: questions@fatsciencepodcast.com or dr.c@fatsciencepodcast.com

Fat Science is supported by the Diabesity Institute, a nonprofit dedicated to increasing access to effective, science-based metabolic care.

Disclaimer: This podcast is for informational purposes only and is not intended as medical advice. Please consult with a qualified healthcare provider for personalized recommendations.