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AMA #9: Kratom Risks, Does Infrared Sauna Work & Journaling Benefits

Welcome to a preview of the ninth Ask Me Anything (AMA) episode, part of the Huberman Lab Premium subscription.

Andrew Hubermanhost
Jul 27, 202326mWatch on YouTube ↗

Summaries, chapters, transcripts, and FAQs on this page are made by uListen, not YouTube.

At a glance

WHAT IT’S REALLY ABOUT

Kratom Unmasked: Opioid Risks, Addiction Pathways, and Safer Choices

  1. Andrew Huberman uses this AMA to dissect kratom as a psychoactive compound, emphasizing that it is pharmacologically an opioid with real addiction and respiratory risks. He explains how kratom’s effects shift from mild stimulation at low doses to analgesia and sedation at higher doses via activation of the mu‑opioid receptor system. While acknowledging that some people have used kratom to taper off stronger prescription opioids, he stresses that kratom itself can become a serious dependency or even a direct entry point into opioid addiction. He ultimately advises people who have never used kratom to avoid it entirely and urges current users to be extremely cautious about dose escalation and co-use with other depressants.

IDEAS WORTH REMEMBERING

5 ideas

If you’ve never tried kratom, the safest choice is to avoid it entirely.

Huberman stresses a simple but powerful principle: you cannot get addicted to a substance you never consume. Given kratom’s clear opioid pharmacology and a significant subset of people who respond very strongly to opioids, first-time experimentation can open the door to potent reinforcement and addiction that would never exist otherwise.

Kratom is an opioid acting primarily via the mu‑opioid receptor, not a benign herbal stimulant.

Kratom’s active alkaloids bind the same mu‑opioid receptors targeted by morphine and hydrocodone, producing analgesia, sedation, and euphoria at higher doses. Blocking mu‑opioid receptors abolishes kratom’s subjective effects, confirming its opioid mechanism despite marketing narratives that suggest it is fundamentally different or non-addictive.

Addiction risk to kratom is highly individual, with a sizeable minority at very high risk.

Somewhere between 10–40% of people appear to experience particularly potent reinforcing effects from opioids. For these individuals, kratom can feel extremely good, making dose escalation and compulsive use much more likely. They tend to deny addiction but become anxious when asked to abstain for even a short period, a hallmark of dependence.

Using kratom to taper off stronger opioids is at best a narrow, medically supervised harm-reduction strategy.

Huberman acknowledges reports and clinicians who have seen patients use kratom to move off morphine or hydrocodone. However, he notes this is only defensible if it is part of a structured plan to progressively lower the kratom dose and eventually stop all opioids. Otherwise, people can end up simply swapping one opioid dependence for another with slightly lower potency.

Dose, product variability, and co-use with other depressants greatly influence kratom’s danger profile.

Commercial kratom products can have wildly different alkaloid compositions, making gram-based dosing comparisons unreliable across brands. Higher doses raise addiction risk and, when combined with other opioids or alcohol, can suppress respiration enough to cause death, likely via interference with brainstem circuits that generate physiological sighs during sleep.

WORDS WORTH SAVING

5 quotes

It is impossible to get addicted to a substance that you’ve never consumed.

— Andrew Huberman

We really have to look at kratom as an opioid. That’s just the honest truth.

— Andrew Huberman

If you haven’t touched kratom, don’t touch it at all, ever.

— Andrew Huberman

The idea that substance A is not as bad as substance B and that making substance A unavailable is just gonna send everyone running for substance B… that’s a weak argument, frankly.

— Andrew Huberman

Kratom is simply not a benign substance.

— Andrew Huberman

Read the available transcript
Pharmacology of kratom and its classification as an opioidAddiction risk, individual variability, and withdrawal with kratomComparison of kratom to prescription opioids (morphine, hydrocodone, oxycodone)Role of endogenous opioid and dopamine systems in reinforcement and euphoriaRespiratory suppression and overdose mechanisms in opioid useHarm reduction versus abstinence framing for kratom and other substancesHuberman Lab Premium model and funding human-based health research

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