Mailbag: Fasting, Food Noise & GLP-1s

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.