Huberman Lab

Dr. Alia Crum on Huberman Lab: How Beliefs Alter Hormones

In Crum's milkshake study, belief alone tripled the ghrelin drop. She explains how food, stress, and exercise mindsets alter hormones and blood pressure.

AHAndrew HubermanhostACDr. Alia Crumguest

Sep 4, 2025·34m·Watch on YouTube ↗

📖 CHAPTERS

1. 1
   0:40 – 2:30

   Defining Mindsets and Their Role in Shaping Reality

   Crum introduces mindsets as core beliefs that simplify complex domains like stress, intelligence, and health. She connects this to Carol Dweck's work and explains how these assumptions guide expectations, motivation, and behavior well beyond simple 'positive thinking.'

2. 2
   2:30 – 5:20

   Mindsets Across Domains: Stress, Food, Exercise, Illness, Side Effects

   The discussion expands to specific examples of mindsets and the typical negative defaults in Western culture. Crum highlights how assumptions about stress, healthy food, exercise sufficiency, illness seriousness, and side-effect meaning can shape attention, motivation, and physiology.

3. 3
   5:20 – 9:35

   The Milkshake Study: How Beliefs Change Hunger Hormones

   Crum details her Yale milkshake experiment testing whether beliefs about a food alter physiological response while nutrients are held constant. Believing a shake was indulgent versus sensible produced dramatically different ghrelin patterns, revealing that mindset about food can modulate satiety and metabolism.

4. 4
   9:35 – 13:50

   Diet Camps, Placebo, and Nocebo: Belief Effects in Nutrition and Health

   Huberman and Crum connect diet subcultures and placebo/nocebo research, arguing that belief systems around plant-based, keto, or carnivore diets likely contribute to perceived benefits. They emphasize that outcomes are a joint product of objective behavior and subjective belief, including negative expectations that create real side effects.

5. 5
   13:50 – 18:00

   Hotel Housekeepers Study: Reframing Work as Exercise

   Crum describes research with hotel housekeepers who were physically active but did not perceive their work as exercise. Simply educating one group that their work met exercise guidelines improved weight and blood pressure without behavior change, illustrating how exercise mindsets influence health.

6. 6
   18:00 – 22:00

   Rethinking Stress: From Public Health Villain to Potential Asset

   The conversation shifts to stress, contrasting simplistic ‘stress is toxic’ messaging with research showing stress can enhance focus, learning, and growth. Crum introduces the concept of stress mindsets and describes interventions that reframe stress as potentially enhancing, leading to better health and performance.

7. 7
   22:00 – 25:30

   Stress Mindset Intervention: UBS Study and Mechanisms of Change

   Crum outlines a field experiment during the 2008 financial crisis where stressed employees watched brief videos framing stress as either harmful or enhancing. Those exposed to enhancing messages shifted their mindsets and experienced fewer physical symptoms and higher performance, showing that stress beliefs are malleable and impactful.

8. 8
   25:30 – 27:20

   How Stress Mindsets Shift Motivation, Emotion, and Physiology

   Crum explains how viewing stress as harmful drives ‘freak out or check out’ responses, whereas an enhancing mindset prompts using stress to pursue growth and problem-solving. She discusses changes in affect and hormones like cortisol and DHEA, and Huberman links this to work on adrenaline, dopamine, and testosterone.

9. 9
   27:20 – 29:40

   A Practical Framework: Acknowledge, Welcome, and Utilize Stress

   The discussion turns explicitly practical as Crum offers a three-step method to leverage stress. She and Huberman highlight stress’s built-in advantages—like sharpened attention and faster processing—and contrast this with approaches that focus only on managing or suppressing stress.

10. 10
    29:40 – 34:12

    Personal Roots, Placebo’s Untapped Potential, and Invitation to Experiment

    Crum reflects on her athletic and family background that primed her to value the mind–body connection and describes her mission to rigorously harness these effects in medicine and daily life. She urges listeners to examine and update their own mindsets and offers resources for applying these ideas.