Does cannabis undermine progression in life? (& let’s not get into the “it’s not as bad as alcohol”… that’s stoner logic & more seriously, we also fairly discussed alcohol in this episode. ⁦Keith Humphreys⁩ of ⁦Stanford University⁩ on the Huberman Lab podcast out now

@KeithNHumphreys @Stanford Alcohol = Poison Marijuana = Healing medicine next question

@KeithNHumphreys @Stanford "Marijuana is the drug of illusion. It creates the illusion that you're thinking great thoughts and doing great things while you're sitting on the sofa and growing a beard." —John Mcafee

@KeithNHumphreys @Stanford Good times make weed men. Weed men make hard times. Hard times make nicotine men. Nicotine men make good times.

I have used it as a tool for performance enhancement for my entire career. My career requires tons of screen time. I detach, reset, and unwind in nature with cannabis which has allowed for a consistent, slightly insane prolonged worth ethic, regulating mental balance. In my earlier years, it was a work out motivator when I was in college and going to the gym 5 days a week. As with most things in life, the result is dependent on the individual, not the plant.

Tired subject at this point Cannabis is a way of life, an extraordinary plant with unlimited healing potential that will also open your mind to a different way of seeing life/reality in a more positive way. At its best it improves mood, alleviates pain, heals the body and offers perspective that is in alignment with nature Does it have a dark side ? Absolutely Everything in life has polarity Everything beyond moderation will impair you Everything has a trade off It doesn't matter if some scientist finds out 100 reasons why cannabis is bad for you . They actually dont know anything because their mind is a closed loop . Nor is the opinion of any psychiatrist valid in the slightest . None of them have ever healed a single person in life from anything. They just diagnose people with made up conditions and virtue themselves. There's a reason the powers that vilified the plant for centuries, because they know its potential to unlock the mind and break free from false authority. There's a reason the governments now know they cant stop the movement so they got in to control it and radiate it and posion it like they do all things There's a reason this plant is here on earth Its to be used, to be protected, to be honored Anything anyone says otherwise is just a rambling fool

@KeithNHumphreys @Stanford Yes too many people use weed excuses because I agree it’s not bad for your health. It just turns 99% of people that smoke it everyday into wasted potential. There is 1% that can actively smoke and excel. But even most then are cutting potential short. Experience talk here.

@KeithNHumphreys @Stanford Now big alcohol is paying you too huh?

@KeithNHumphreys @Stanford After 20 years of working in the psychiatric field I got to say: I never saw anything good coming from cannabis use. Worst things, if consumes during adolescence.

@KeithNHumphreys @Stanford saying its better than alcohol is not saying much lol, alc is pure poison

@KeithNHumphreys @Stanford "Cannabis undermines motivation to do much of anything. Couch lock is a real thing." 🤔 Totally baseless 🙄

@KeithNHumphreys @Stanford cannabis gives you brain fog and turns you into a bummy loser cant believe there are still debates on this

@KeithNHumphreys @Stanford Humphreys promoting booze on his Twitter account. Probably just a coincidence.

@KeithNHumphreys @Stanford Everything he said is quite helpful for people with anxiety who feel they can never get enough done and can't stop thinking, though. Dosage, strain, timing, and individual needs must be considered.

@KeithNHumphreys @Stanford For me, it’s obviously been performance enhancing. I smoked cannabis 3075 days in a row. This happened! I got stoned on the treadmill not the couch. For others 🤷🏼‍♂️

@KeithNHumphreys @Stanford weed can definitely be a trap man

@KeithNHumphreys @Stanford Comparing substances misses the deeper issue. The real measure is whether something helps or hinders momentum, discipline, and long-term goals. If it consistently dulls drive or delays growth, the cost shows up over time, not overnight.

@KeithNHumphreys @Stanford Performance can mean many things and it can absolutely enhance certain types of performance.

@KeithNHumphreys @Stanford Just in: cannabis makes you chill instead of being a 24/7 matrix drone. Mind blowing content. Who could've ever predicted this? Almost like that's why many people choose it… for fun, creativity, or downtime.

@KeithNHumphreys @Stanford Cannabis is best used 2 - 3 times a month in high doses and be paired with an activity. It's wild to me how so few people know this protocol

@KeithNHumphreys @Stanford weed excites dumb ppl

@KeithNHumphreys @Stanford I worked in one of the most difficult professions in the world. 30+ years, achieved ranks and a great retirement. I didn't use cannabis then because of drug testing. I am retired and use cannabis daily. I don't drink alcohol anymore thank God. Cannabis should be legal today!

@KeithNHumphreys @Stanford As someone who consumed tons of cannabis almost daily for my late teens and early 20s, I’m almost positive it’s done a number on me permanently. Issues with impulse control, anxiety, short term memory. No free biological lunches I guess

@KeithNHumphreys @Stanford It's a tool. Misuse the tool, and it will certainly undermine you. Use it wisely, and it can unlock a better future for yourself. Better education on risks is definitely needed.

@KeithNHumphreys @Stanford 🤔What about high CBD cannabis with less than a 1mg THC (organic plant flower) vaped?

I love the lack of specificity. Trying to sound quantitative but just giving an opinion. Cannabis absolutely helps concentration. Gamers/musicians/artists “lock in” with it. Allows you to enter flow state so much easier than being sober. Never listen to a boomer talk about cannabis.

@KeithNHumphreys @Stanford Def has negative effects but can also be essentially a nothingburger for some people. I’ve smoked daily for 20+ years and work in the trades at a high level, never really affected me. Quit last year though and have seen some improvements, but overall not much changed.

The most accurate statement in this clip is that many highly successful people do, in fact, use cannabis. That alone tells us the relationship between cannabis and life progression is not categorical. It is conditional. Data shows THC can be performance-degrading for some people, particularly at higher doses or with frequent, non-therapeutic use. Acute effects on attention, short-term memory, reaction time, and motivation are well documented. But those outcomes are dose, frequency, and context-dependent, which is where public discussion often becomes imprecise. What’s frequently missing is a clear distinction between therapeutic use and abuse. Cannabinoids are among the most extensively studied plant-derived compounds in modern medicine. Major reviews, including those from the National Academies of Sciences, show substantial evidence for medical cannabis in chronic pain, chemotherapy-induced nausea, multiple-sclerosis–related spasticity, and seizure disorders. FDA-approved cannabinoid medicines have demonstrated 30–40%+ seizure reductions in treatment-resistant epilepsy. For many patients, these outcomes are genuinely life-altering. From a safety standpoint, cannabis does not cause fatal overdoses like opioids such as fentanyl because cannabinoid receptors are not densely concentrated in the brainstem regions that control breathing. Cannabis lacks this mechanism, which is why there have been no documented overdose deaths from cannabis alone in decades of medical literature, and implying otherwise misrepresents the science and contributes to misinformation. It’s also worth noting that the side effects often cited here cognitive dulling, memory disruption, motivational blunting occur just as commonly, and often more persistently, with many socially accepted medications such as antidepressants, sedatives, and stimulants. The difference with therapeutic cannabis is dose titration rather than chronic overmedication. I say this as a scientist and as a long-term executive of a global medical cannabis company who does not personally use cannabis. I’ve witnessed outcomes consistent with large-scale clinical research, including a mother of three with a brain tumor regaining the ability to walk, speak, and care for her children, and an eight-year-old boy reducing grand mal seizures from over 300 per month to fewer than 20. These are not personal opinions or isolated anecdotes; they reflect outcomes repeatedly documented across randomized trials, observational studies, and national clinical datasets. As scientists and clinicians, there is an obligation to evaluate how data is collected, how they are interpreted, where they may be skewed, and to present them clearly without ideology attached. On large platforms, that responsibility matters. Lives depend on it. 🙏

@KeithNHumphreys @Stanford Not many things you do or take to change your mood are good for you and probably the opposite

@KeithNHumphreys @Stanford It absolutely does. And that's coming from experience. Sober now 🙏🏽 and accomplishing a lot more

@KeithNHumphreys @Stanford predicting a new 2026 trend: microdosing tetrahydrocannabinol

Dr. Humphreys is a thoughtful, balanced educator who brings clarity and integrity to this issue. At the same time, it’s important to recognize that professional success does not protect individuals—or the public—from the harms of substance use. Many successful people use a variety of drugs, but it doesn't mean they don't experience negative consequences. The public must know that cannabis is now recognized as the leading environmental risk factor for psychosis and schizophrenia, particularly among young men ages 21–29. Research shows a clear and concerning link between cannabis use disorder and the onset of severe mental illness. 🔗 @realDonaldTrump will not Make America Great Again by allowing widespread retail THC that fuels mental illness and undermines the mental health and future of our young men. Cannabis cannot be regulated like alcohol: a single use of alcohol does not trigger psychosis, but a single use of cannabis can.

@KeithNHumphreys @Stanford Couch lock has more to do with algorithms than weed. •

@KeithNHumphreys @Stanford I’ll die on this hill, but the “successful” ones who consume see it as performance enhancing. Not degrading.

@KeithNHumphreys @Stanford I was born with severe adhd. I suffer from all of those symptoms times 10 on a daily basis. Cannabis was the only thing that helps me feel like I’ve reached a state of homeopathy. Years of doctors and pills and NA licenses revoked due to the sheer number they were giving me. You

@KeithNHumphreys @Stanford I'll sum this up to "Some people are just lazy. Weed or not."