Huberman Lab

Boost Your Energy & Immune System with Cortisol & Adrenaline | Huberman Lab Essentials

In this Huberman Lab Essentials episode, I explain how specific hormones influence both energy levels and the immune system and discuss practical tools for increasing energy throughout the day and managing stress. I discuss the mechanism through which cortisol and epinephrine (adrenaline) impact the brain and body and why it’s important to regulate their levels, considering factors like time of day or stress levels. I also cover the positive benefits of short-term stress and behavioral protocols to increase energy and enhance stress resilience. Additionally, I explain how to optimize hormone levels through tools like sunlight exposure, meal timing, and supplements such as ashwagandha. Episode show notes: https://go.hubermanlab.com/IcLrgLk Huberman Lab Essentials are short episodes focused on essential science and protocol takeaways from past full-length Huberman Lab episodes. Watch or listen to the full-length episode: https://youtu.be/JPX8g8ibKFc Watch more Huberman Lab Essentials episodes: https://youtube.com/playlist?list=PLPNW_gerXa4OGNy1yE-W9IX-tPu-tJa7S *Timestamps* 00:00:00 Huberman Lab Essentials; Immunity & Energy 00:01:34 Cortisol, Epinephrine (Adrenaline) 00:03:32 Cortisol & Epinephrine Biology 00:05:20 Timing Cortisol Release, Tool: Morning Sunlight Exposure 00:07:36 Daytime Stress, Learning & Cortisol 00:08:59 Tool: Increase Energy, Ice Baths, Cyclic Breathing, HIIT 00:13:52 Tool: Building Resilience; Cortisol vs. Epinephrine Effects, Immune System 00:17:55 Brief Stressors & Immune System 00:21:37 Chronic Stress, Cortisol, Hunger & Food Choice 00:23:56 Stress & Gray Hair? 00:24:33 Reduce Cortisol & Supplements, Ashwagandha, Apigenin 00:26:18 Optimizing Cortisol & Epinephrine, Tool: Meals, Circadian Eating, Fasting 00:28:54 Recap & Key Takeaways Disclaimer & Disclosures: https://www.hubermanlab.com/disclaimer

AHAndrew Hubermanhost

Mar 13, 2025·30m·Watch on YouTube ↗

📖 CHAPTERS

1. 1
   0:00 – 2:40

   Introduction: Redefining Stress Hormones as Energy Tools

   Huberman frames the episode as a practical guide to using cortisol and epinephrine to boost daily energy and immune function. He emphasizes that these hormones, often vilified as ‘stress hormones,’ are essential when properly timed and regulated.

2. 2
   2:40 – 5:50

   Cortisol and Epinephrine 101: Origins and Core Functions

   He explains what cortisol and epinephrine are, how they’re produced, and where they act. Cortisol is positioned as a competitor to sex hormones and an energy-mobilizing steroid, while epinephrine is shown as a key player in alertness, memory, and immunity.

3. 3
   5:50 – 12:00

   Morning Light and Timing Cortisol for Optimal Daily Energy

   Huberman outlines how to anchor the main daily cortisol pulse to the morning using natural light. He details light intensity (lux) differences between outdoor and indoor light and gives concrete exposure times for different weather conditions.

4. 4
   12:00 – 17:10

   Acute Stress ‘Blips’: Harnessing Cortisol and Adrenaline Spikes

   He explains that life stressors and deliberate stress practices both cause short-lived spikes in cortisol and epinephrine, which can be beneficial if brief. He highlights their roles in neuroplasticity, attention, and learning.

5. 5
   17:10 – 20:10

   Deliberate Stress Protocols: Cold, Breathing, and High-Intensity Exercise

   Huberman introduces common deliberate stress techniques such as Wim Hof/Tummo breathing, ice baths, and high-intensity training. He stresses that these tools can either enhance or deplete immunity depending on dosage and frequency.

6. 6
   20:10 – 22:50

   Reframing Stress and Leveraging Dopamine for Greater Output

   He clarifies that simply ‘telling yourself it’s good’ doesn’t change the hormone’s basic effects, but it can alter your dopamine response. This dopamine increase extends your capacity to push through stress by fueling more epinephrine release.

7. 7
   22:50 – 27:40

   Practical Protocols to Boost Daytime Energy via Deliberate Stress

   Huberman offers a concrete approach for people with low daytime energy: regularly schedule a stress-inducing practice. He demonstrates the cyclic inhale-exhale breathing pattern and explains its adrenaline-driven alerting effects.

8. 8
   27:40 – 32:40

   Mechanism Focus: Building Calm Mind–Alert Body as a Trainable Skill

   He moves from protocols to mechanisms, emphasizing that understanding how hormones act helps ensure correct application. The goal is to create bodily readiness (via adrenaline) while keeping the mind relatively calm (limiting brainstem epinephrine).

9. 9
   32:40 – 39:20

   Acute Stress and Immunity: Classic and Modern Evidence

   Huberman reviews foundational work (Bruce McEwen) and a key human study (Kox et al. 2014) showing that brief stress improves immune responses. He highlights how voluntary activation of the sympathetic nervous system can blunt symptoms of infection.

10. 10
    39:20 – 46:00

    The Dark Side of Chronic Stress: Feedback Loops, Cravings, and Aging

    He turns to the harmful effects of chronically elevated cortisol and epinephrine. Disrupted feedback loops, increased cravings for sugar and fat, metabolic dysregulation, and accelerated hair graying are all linked to persistent stress.

11. 11
    46:00 – 48:40

    Supplement-Based Support for Reducing Chronic Cortisol

    Huberman briefly covers non-prescription supplements that can help lower chronic stress, especially later in the day. He cautions listeners to evaluate safety individually while highlighting ashwagandha and apigenin as particularly useful.

12. 12
    48:40 – 52:20

    Meal Timing, Fasting, and Hormonal Energy Management

    He discusses how meal timing and fasting patterns influence cortisol and adrenaline, thereby affecting perceived energy. He shares his own routine and clarifies how short fasting windows can be used to elevate alertness without drifting into chronic stress.

13. 13
    52:20

    Integrating Practices: Deliberate Adrenaline with Mental Calm and Closing Thoughts

    In closing, Huberman reiterates the importance of deliberate, intermittent stress exposures paired with mental calm. He encourages listeners to assess whether they are under-activated or chronically stressed and to use these tools to gain control over cortisol and adrenaline.